21308520

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:187

約数の個数: 128

約数和(自身を含む): 67495680

約数和(自身を除く): 46187160

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 41, 60, 61, 71, 82, 120, 122, 123, 142, 164, 183, 205, 213, 244, 246, 284, 305, 328, 355, 366, 410, 426, 488, 492, 568, 610, 615, 710, 732, 820, 852, 915, 984, 1065, 1220, 1230, 1420, 1464, 1640, 1704, 1830, 2130, 2440, 2460, 2501, 2840, 2911, 3660, 4260, 4331, 4920, 5002, 5822, 7320, 7503, 8520, 8662, 8733, 10004, 11644, 12505, 12993, 14555, 15006, 17324, 17466, 20008, 21655, 23288, 25010, 25986, 29110, 30012, 34648, 34932, 37515, 43310, 43665, 50020, 51972, 58220, 60024, 64965, 69864, 75030, 86620, 87330, 100040, 103944, 116440, 129930, 150060, 173240, 174660, 177571, 259860, 300120, 349320, 355142, 519720, 532713, 710284, 887855, 1065426, 1420568, 1775710, 2130852, 2663565, 3551420, 4261704, 5327130, 7102840, 10654260, 21308520]

約数ペア:

[(1, 21308520), (2, 10654260), (3, 7102840), (4, 5327130), (5, 4261704), (6, 3551420), (8, 2663565), (10, 2130852), (12, 1775710), (15, 1420568), (20, 1065426), (24, 887855), (30, 710284), (40, 532713), (41, 519720), (60, 355142), (61, 349320), (71, 300120), (82, 259860), (120, 177571), (122, 174660), (123, 173240), (142, 150060), (164, 129930), (183, 116440), (205, 103944), (213, 100040), (244, 87330), (246, 86620), (284, 75030), (305, 69864), (328, 64965), (355, 60024), (366, 58220), (410, 51972), (426, 50020), (488, 43665), (492, 43310), (568, 37515), (610, 34932), (615, 34648), (710, 30012), (732, 29110), (820, 25986), (852, 25010), (915, 23288), (984, 21655), (1065, 20008), (1220, 17466), (1230, 17324), (1420, 15006), (1464, 14555), (1640, 12993), (1704, 12505), (1830, 11644), (2130, 10004), (2440, 8733), (2460, 8662), (2501, 8520), (2840, 7503), (2911, 7320), (3660, 5822), (4260, 5002), (4331, 4920)]