64187500

素因数分解:

$2^2\times 5^6\times {\mathrm{13}}^1\times {\mathrm{79}}^1$

素因数の和:126

約数の個数: 84

約数和(自身を含む): 153123040

約数和(自身を除く): 88935540

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 79, 100, 125, 130, 158, 250, 260, 316, 325, 395, 500, 625, 650, 790, 1027, 1250, 1300, 1580, 1625, 1975, 2054, 2500, 3125, 3250, 3950, 4108, 5135, 6250, 6500, 7900, 8125, 9875, 10270, 12500, 15625, 16250, 19750, 20540, 25675, 31250, 32500, 39500, 40625, 49375, 51350, 62500, 81250, 98750, 102700, 128375, 162500, 197500, 203125, 246875, 256750, 406250, 493750, 513500, 641875, 812500, 987500, 1234375, 1283750, 2468750, 2567500, 3209375, 4937500, 6418750, 12837500, 16046875, 32093750, 64187500]

約数ペア:

[(1, 64187500), (2, 32093750), (4, 16046875), (5, 12837500), (10, 6418750), (13, 4937500), (20, 3209375), (25, 2567500), (26, 2468750), (50, 1283750), (52, 1234375), (65, 987500), (79, 812500), (100, 641875), (125, 513500), (130, 493750), (158, 406250), (250, 256750), (260, 246875), (316, 203125), (325, 197500), (395, 162500), (500, 128375), (625, 102700), (650, 98750), (790, 81250), (1027, 62500), (1250, 51350), (1300, 49375), (1580, 40625), (1625, 39500), (1975, 32500), (2054, 31250), (2500, 25675), (3125, 20540), (3250, 19750), (3950, 16250), (4108, 15625), (5135, 12500), (6250, 10270), (6500, 9875), (7900, 8125)]