20839920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1223}}^1$

素因数の和:1310

約数の個数: 80

約数和(自身を含む): 65567232

約数和(自身を除く): 44727312

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 71, 80, 120, 142, 213, 240, 284, 355, 426, 568, 710, 852, 1065, 1136, 1223, 1420, 1704, 2130, 2446, 2840, 3408, 3669, 4260, 4892, 5680, 6115, 7338, 8520, 9784, 12230, 14676, 17040, 18345, 19568, 24460, 29352, 36690, 48920, 58704, 73380, 86833, 97840, 146760, 173666, 260499, 293520, 347332, 434165, 520998, 694664, 868330, 1041996, 1302495, 1389328, 1736660, 2083992, 2604990, 3473320, 4167984, 5209980, 6946640, 10419960, 20839920]

約数ペア:

[(1, 20839920), (2, 10419960), (3, 6946640), (4, 5209980), (5, 4167984), (6, 3473320), (8, 2604990), (10, 2083992), (12, 1736660), (15, 1389328), (16, 1302495), (20, 1041996), (24, 868330), (30, 694664), (40, 520998), (48, 434165), (60, 347332), (71, 293520), (80, 260499), (120, 173666), (142, 146760), (213, 97840), (240, 86833), (284, 73380), (355, 58704), (426, 48920), (568, 36690), (710, 29352), (852, 24460), (1065, 19568), (1136, 18345), (1223, 17040), (1420, 14676), (1704, 12230), (2130, 9784), (2446, 8520), (2840, 7338), (3408, 6115), (3669, 5680), (4260, 4892)]