21560500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1$

素因数の和:170

約数の個数: 96

約数和(自身を含む): 52835328

約数和(自身を除く): 31274828

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 31, 50, 52, 62, 65, 100, 107, 124, 125, 130, 155, 214, 250, 260, 310, 325, 403, 428, 500, 535, 620, 650, 775, 806, 1070, 1300, 1391, 1550, 1612, 1625, 2015, 2140, 2675, 2782, 3100, 3250, 3317, 3875, 4030, 5350, 5564, 6500, 6634, 6955, 7750, 8060, 10075, 10700, 13268, 13375, 13910, 15500, 16585, 20150, 26750, 27820, 33170, 34775, 40300, 43121, 50375, 53500, 66340, 69550, 82925, 86242, 100750, 139100, 165850, 172484, 173875, 201500, 215605, 331700, 347750, 414625, 431210, 695500, 829250, 862420, 1078025, 1658500, 2156050, 4312100, 5390125, 10780250, 21560500]

約数ペア:

[(1, 21560500), (2, 10780250), (4, 5390125), (5, 4312100), (10, 2156050), (13, 1658500), (20, 1078025), (25, 862420), (26, 829250), (31, 695500), (50, 431210), (52, 414625), (62, 347750), (65, 331700), (100, 215605), (107, 201500), (124, 173875), (125, 172484), (130, 165850), (155, 139100), (214, 100750), (250, 86242), (260, 82925), (310, 69550), (325, 66340), (403, 53500), (428, 50375), (500, 43121), (535, 40300), (620, 34775), (650, 33170), (775, 27820), (806, 26750), (1070, 20150), (1300, 16585), (1391, 15500), (1550, 13910), (1612, 13375), (1625, 13268), (2015, 10700), (2140, 10075), (2675, 8060), (2782, 7750), (3100, 6955), (3250, 6634), (3317, 6500), (3875, 5564), (4030, 5350)]