21536840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{499}}^1$

素因数の和:606

約数の個数: 64

約数和(自身を含む): 52920000

約数和(自身を除く): 31383160

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 83, 104, 130, 166, 260, 332, 415, 499, 520, 664, 830, 998, 1079, 1660, 1996, 2158, 2495, 3320, 3992, 4316, 4990, 5395, 6487, 8632, 9980, 10790, 12974, 19960, 21580, 25948, 32435, 41417, 43160, 51896, 64870, 82834, 129740, 165668, 207085, 259480, 331336, 414170, 538421, 828340, 1076842, 1656680, 2153684, 2692105, 4307368, 5384210, 10768420, 21536840]

約数ペア:

[(1, 21536840), (2, 10768420), (4, 5384210), (5, 4307368), (8, 2692105), (10, 2153684), (13, 1656680), (20, 1076842), (26, 828340), (40, 538421), (52, 414170), (65, 331336), (83, 259480), (104, 207085), (130, 165668), (166, 129740), (260, 82834), (332, 64870), (415, 51896), (499, 43160), (520, 41417), (664, 32435), (830, 25948), (998, 21580), (1079, 19960), (1660, 12974), (1996, 10790), (2158, 9980), (2495, 8632), (3320, 6487), (3992, 5395), (4316, 4990)]