25187500

素因数分解:

$2^2\times 5^6\times {\mathrm{13}}^1\times {\mathrm{31}}^1$

素因数の和:78

約数の個数: 84

約数和(自身を含む): 61249216

約数和(自身を除く): 36061716

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 31, 50, 52, 62, 65, 100, 124, 125, 130, 155, 250, 260, 310, 325, 403, 500, 620, 625, 650, 775, 806, 1250, 1300, 1550, 1612, 1625, 2015, 2500, 3100, 3125, 3250, 3875, 4030, 6250, 6500, 7750, 8060, 8125, 10075, 12500, 15500, 15625, 16250, 19375, 20150, 31250, 32500, 38750, 40300, 40625, 50375, 62500, 77500, 81250, 96875, 100750, 162500, 193750, 201500, 203125, 251875, 387500, 406250, 484375, 503750, 812500, 968750, 1007500, 1259375, 1937500, 2518750, 5037500, 6296875, 12593750, 25187500]

約数ペア:

[(1, 25187500), (2, 12593750), (4, 6296875), (5, 5037500), (10, 2518750), (13, 1937500), (20, 1259375), (25, 1007500), (26, 968750), (31, 812500), (50, 503750), (52, 484375), (62, 406250), (65, 387500), (100, 251875), (124, 203125), (125, 201500), (130, 193750), (155, 162500), (250, 100750), (260, 96875), (310, 81250), (325, 77500), (403, 62500), (500, 50375), (620, 40625), (625, 40300), (650, 38750), (775, 32500), (806, 31250), (1250, 20150), (1300, 19375), (1550, 16250), (1612, 15625), (1625, 15500), (2015, 12500), (2500, 10075), (3100, 8125), (3125, 8060), (3250, 7750), (3875, 6500), (4030, 6250)]