28008500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:202

約数の個数: 96

約数和(自身を含む): 68490240

約数和(自身を除く): 40481740

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 31, 50, 52, 62, 65, 100, 124, 125, 130, 139, 155, 250, 260, 278, 310, 325, 403, 500, 556, 620, 650, 695, 775, 806, 1300, 1390, 1550, 1612, 1625, 1807, 2015, 2780, 3100, 3250, 3475, 3614, 3875, 4030, 4309, 6500, 6950, 7228, 7750, 8060, 8618, 9035, 10075, 13900, 15500, 17236, 17375, 18070, 20150, 21545, 34750, 36140, 40300, 43090, 45175, 50375, 56017, 69500, 86180, 90350, 100750, 107725, 112034, 180700, 201500, 215450, 224068, 225875, 280085, 430900, 451750, 538625, 560170, 903500, 1077250, 1120340, 1400425, 2154500, 2800850, 5601700, 7002125, 14004250, 28008500]

約数ペア:

[(1, 28008500), (2, 14004250), (4, 7002125), (5, 5601700), (10, 2800850), (13, 2154500), (20, 1400425), (25, 1120340), (26, 1077250), (31, 903500), (50, 560170), (52, 538625), (62, 451750), (65, 430900), (100, 280085), (124, 225875), (125, 224068), (130, 215450), (139, 201500), (155, 180700), (250, 112034), (260, 107725), (278, 100750), (310, 90350), (325, 86180), (403, 69500), (500, 56017), (556, 50375), (620, 45175), (650, 43090), (695, 40300), (775, 36140), (806, 34750), (1300, 21545), (1390, 20150), (1550, 18070), (1612, 17375), (1625, 17236), (1807, 15500), (2015, 13900), (2780, 10075), (3100, 9035), (3250, 8618), (3475, 8060), (3614, 7750), (3875, 7228), (4030, 6950), (4309, 6500)]