221400720

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^2$

素因数の和:222

約数の個数: 180

約数和(自身を含む): 766520508

約数和(自身を除く): 545119788

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 61, 71, 72, 80, 90, 120, 122, 142, 144, 180, 183, 213, 240, 244, 284, 305, 355, 360, 366, 426, 488, 549, 568, 610, 639, 710, 720, 732, 852, 915, 976, 1065, 1098, 1136, 1220, 1278, 1420, 1464, 1704, 1830, 2130, 2196, 2440, 2556, 2745, 2840, 2928, 3195, 3408, 3660, 4260, 4331, 4392, 4880, 5041, 5112, 5490, 5680, 6390, 7320, 8520, 8662, 8784, 10082, 10224, 10980, 12780, 12993, 14640, 15123, 17040, 17324, 20164, 21655, 21960, 25205, 25560, 25986, 30246, 34648, 38979, 40328, 43310, 43920, 45369, 50410, 51120, 51972, 60492, 64965, 69296, 75615, 77958, 80656, 86620, 90738, 100820, 103944, 120984, 129930, 151230, 155916, 173240, 181476, 194895, 201640, 207888, 226845, 241968, 259860, 302460, 307501, 311832, 346480, 362952, 389790, 403280, 453690, 519720, 604920, 615002, 623664, 725904, 779580, 907380, 922503, 1039440, 1209840, 1230004, 1537505, 1559160, 1814760, 1845006, 2460008, 2767509, 3075010, 3118320, 3629520, 3690012, 4612515, 4920016, 5535018, 6150020, 7380024, 9225030, 11070036, 12300040, 13837545, 14760048, 18450060, 22140072, 24600080, 27675090, 36900120, 44280144, 55350180, 73800240, 110700360, 221400720]

約数ペア:

[(1, 221400720), (2, 110700360), (3, 73800240), (4, 55350180), (5, 44280144), (6, 36900120), (8, 27675090), (9, 24600080), (10, 22140072), (12, 18450060), (15, 14760048), (16, 13837545), (18, 12300040), (20, 11070036), (24, 9225030), (30, 7380024), (36, 6150020), (40, 5535018), (45, 4920016), (48, 4612515), (60, 3690012), (61, 3629520), (71, 3118320), (72, 3075010), (80, 2767509), (90, 2460008), (120, 1845006), (122, 1814760), (142, 1559160), (144, 1537505), (180, 1230004), (183, 1209840), (213, 1039440), (240, 922503), (244, 907380), (284, 779580), (305, 725904), (355, 623664), (360, 615002), (366, 604920), (426, 519720), (488, 453690), (549, 403280), (568, 389790), (610, 362952), (639, 346480), (710, 311832), (720, 307501), (732, 302460), (852, 259860), (915, 241968), (976, 226845), (1065, 207888), (1098, 201640), (1136, 194895), (1220, 181476), (1278, 173240), (1420, 155916), (1464, 151230), (1704, 129930), (1830, 120984), (2130, 103944), (2196, 100820), (2440, 90738), (2556, 86620), (2745, 80656), (2840, 77958), (2928, 75615), (3195, 69296), (3408, 64965), (3660, 60492), (4260, 51972), (4331, 51120), (4392, 50410), (4880, 45369), (5041, 43920), (5112, 43310), (5490, 40328), (5680, 38979), (6390, 34648), (7320, 30246), (8520, 25986), (8662, 25560), (8784, 25205), (10082, 21960), (10224, 21655), (10980, 20164), (12780, 17324), (12993, 17040), (14640, 15123)]