20316400

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{3907}}^1$

素因数の和:3938

約数の個数: 60

約数和(自身を含む): 52578232

約数和(自身を除く): 32261832

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 130, 200, 208, 260, 325, 400, 520, 650, 1040, 1300, 2600, 3907, 5200, 7814, 15628, 19535, 31256, 39070, 50791, 62512, 78140, 97675, 101582, 156280, 195350, 203164, 253955, 312560, 390700, 406328, 507910, 781400, 812656, 1015820, 1269775, 1562800, 2031640, 2539550, 4063280, 5079100, 10158200, 20316400]

約数ペア:

[(1, 20316400), (2, 10158200), (4, 5079100), (5, 4063280), (8, 2539550), (10, 2031640), (13, 1562800), (16, 1269775), (20, 1015820), (25, 812656), (26, 781400), (40, 507910), (50, 406328), (52, 390700), (65, 312560), (80, 253955), (100, 203164), (104, 195350), (130, 156280), (200, 101582), (208, 97675), (260, 78140), (325, 62512), (400, 50791), (520, 39070), (650, 31256), (1040, 19535), (1300, 15628), (2600, 7814), (3907, 5200)]