121211240

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{239}}^1\times {\mathrm{409}}^1$

素因数の和:690

約数の個数: 64

約数和(自身を含む): 283392000

約数和(自身を除く): 162180760

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 239, 248, 310, 409, 478, 620, 818, 956, 1195, 1240, 1636, 1912, 2045, 2390, 3272, 4090, 4780, 7409, 8180, 9560, 12679, 14818, 16360, 25358, 29636, 37045, 50716, 59272, 63395, 74090, 97751, 101432, 126790, 148180, 195502, 253580, 296360, 391004, 488755, 507160, 782008, 977510, 1955020, 3030281, 3910040, 6060562, 12121124, 15151405, 24242248, 30302810, 60605620, 121211240]

約数ペア:

[(1, 121211240), (2, 60605620), (4, 30302810), (5, 24242248), (8, 15151405), (10, 12121124), (20, 6060562), (31, 3910040), (40, 3030281), (62, 1955020), (124, 977510), (155, 782008), (239, 507160), (248, 488755), (310, 391004), (409, 296360), (478, 253580), (620, 195502), (818, 148180), (956, 126790), (1195, 101432), (1240, 97751), (1636, 74090), (1912, 63395), (2045, 59272), (2390, 50716), (3272, 37045), (4090, 29636), (4780, 25358), (7409, 16360), (8180, 14818), (9560, 12679)]