21494720

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{5167}}^1$

素因数の和:5197

約数の個数: 56

約数和(自身を含む): 55132224

約数和(自身を除く): 33637504

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 5167, 10334, 20668, 25835, 41336, 51670, 67171, 82672, 103340, 134342, 165344, 206680, 268684, 330688, 335855, 413360, 537368, 671710, 826720, 1074736, 1343420, 1653440, 2149472, 2686840, 4298944, 5373680, 10747360, 21494720]

約数ペア:

[(1, 21494720), (2, 10747360), (4, 5373680), (5, 4298944), (8, 2686840), (10, 2149472), (13, 1653440), (16, 1343420), (20, 1074736), (26, 826720), (32, 671710), (40, 537368), (52, 413360), (64, 335855), (65, 330688), (80, 268684), (104, 206680), (130, 165344), (160, 134342), (208, 103340), (260, 82672), (320, 67171), (416, 51670), (520, 41336), (832, 25835), (1040, 20668), (2080, 10334), (4160, 5167)]