257521260

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{991}}^1$

素因数の和:1135

約数の個数: 96

約数和(自身を含む): 743952384

約数和(自身を除く): 486431124

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 61, 71, 122, 142, 183, 213, 244, 284, 305, 355, 366, 426, 610, 710, 732, 852, 915, 991, 1065, 1220, 1420, 1830, 1982, 2130, 2973, 3660, 3964, 4260, 4331, 4955, 5946, 8662, 9910, 11892, 12993, 14865, 17324, 19820, 21655, 25986, 29730, 43310, 51972, 59460, 60451, 64965, 70361, 86620, 120902, 129930, 140722, 181353, 211083, 241804, 259860, 281444, 302255, 351805, 362706, 422166, 604510, 703610, 725412, 844332, 906765, 1055415, 1209020, 1407220, 1813530, 2110830, 3627060, 4221660, 4292021, 8584042, 12876063, 17168084, 21460105, 25752126, 42920210, 51504252, 64380315, 85840420, 128760630, 257521260]

約数ペア:

[(1, 257521260), (2, 128760630), (3, 85840420), (4, 64380315), (5, 51504252), (6, 42920210), (10, 25752126), (12, 21460105), (15, 17168084), (20, 12876063), (30, 8584042), (60, 4292021), (61, 4221660), (71, 3627060), (122, 2110830), (142, 1813530), (183, 1407220), (213, 1209020), (244, 1055415), (284, 906765), (305, 844332), (355, 725412), (366, 703610), (426, 604510), (610, 422166), (710, 362706), (732, 351805), (852, 302255), (915, 281444), (991, 259860), (1065, 241804), (1220, 211083), (1420, 181353), (1830, 140722), (1982, 129930), (2130, 120902), (2973, 86620), (3660, 70361), (3964, 64965), (4260, 60451), (4331, 59460), (4955, 51972), (5946, 43310), (8662, 29730), (9910, 25986), (11892, 21655), (12993, 19820), (14865, 17324)]