20439250

素因数分解:

$2^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{331}}^1$

素因数の和:380

約数の個数: 64

約数和(自身を含む): 43505280

約数和(自身を除く): 23066030

約数列:

[1, 2, 5, 10, 13, 19, 25, 26, 38, 50, 65, 95, 125, 130, 190, 247, 250, 325, 331, 475, 494, 650, 662, 950, 1235, 1625, 1655, 2375, 2470, 3250, 3310, 4303, 4750, 6175, 6289, 8275, 8606, 12350, 12578, 16550, 21515, 30875, 31445, 41375, 43030, 61750, 62890, 81757, 82750, 107575, 157225, 163514, 215150, 314450, 408785, 537875, 786125, 817570, 1075750, 1572250, 2043925, 4087850, 10219625, 20439250]

約数ペア:

[(1, 20439250), (2, 10219625), (5, 4087850), (10, 2043925), (13, 1572250), (19, 1075750), (25, 817570), (26, 786125), (38, 537875), (50, 408785), (65, 314450), (95, 215150), (125, 163514), (130, 157225), (190, 107575), (247, 82750), (250, 81757), (325, 62890), (331, 61750), (475, 43030), (494, 41375), (650, 31445), (662, 30875), (950, 21515), (1235, 16550), (1625, 12578), (1655, 12350), (2375, 8606), (2470, 8275), (3250, 6289), (3310, 6175), (4303, 4750)]