20613125

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1$

素因数の和:135

約数の個数: 40

約数和(自身を含む): 28865760

約数和(自身を除く): 8252635

約数列:

[1, 5, 13, 25, 43, 59, 65, 125, 215, 295, 325, 559, 625, 767, 1075, 1475, 1625, 2537, 2795, 3835, 5375, 7375, 8125, 12685, 13975, 19175, 26875, 32981, 36875, 63425, 69875, 95875, 164905, 317125, 349375, 479375, 824525, 1585625, 4122625, 20613125]

約数ペア:

[(1, 20613125), (5, 4122625), (13, 1585625), (25, 824525), (43, 479375), (59, 349375), (65, 317125), (125, 164905), (215, 95875), (295, 69875), (325, 63425), (559, 36875), (625, 32981), (767, 26875), (1075, 19175), (1475, 13975), (1625, 12685), (2537, 8125), (2795, 7375), (3835, 5375)]