20512017500

素因数分解:

$2^2\times 5^4\times {\mathrm{13}}^1\times {\mathrm{631139}}^1$

素因数の和:631176

約数の個数: 60

約数和(自身を含む): 48306193320

約数和(自身を除く): 27794175820

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 500, 625, 650, 1250, 1300, 1625, 2500, 3250, 6500, 8125, 16250, 32500, 631139, 1262278, 2524556, 3155695, 6311390, 8204807, 12622780, 15778475, 16409614, 31556950, 32819228, 41024035, 63113900, 78892375, 82048070, 157784750, 164096140, 205120175, 315569500, 394461875, 410240350, 788923750, 820480700, 1025600875, 1577847500, 2051201750, 4102403500, 5128004375, 10256008750, 20512017500]

約数ペア:

[(1, 20512017500), (2, 10256008750), (4, 5128004375), (5, 4102403500), (10, 2051201750), (13, 1577847500), (20, 1025600875), (25, 820480700), (26, 788923750), (50, 410240350), (52, 394461875), (65, 315569500), (100, 205120175), (125, 164096140), (130, 157784750), (250, 82048070), (260, 78892375), (325, 63113900), (500, 41024035), (625, 32819228), (650, 31556950), (1250, 16409614), (1300, 15778475), (1625, 12622780), (2500, 8204807), (3250, 6311390), (6500, 3155695), (8125, 2524556), (16250, 1262278), (32500, 631139)]