21900560

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{607}}^1$

素因数の和:672

約数の個数: 80

約数和(自身を含む): 56996352

約数和(自身を除く): 35095792

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 41, 44, 55, 80, 82, 88, 110, 164, 176, 205, 220, 328, 410, 440, 451, 607, 656, 820, 880, 902, 1214, 1640, 1804, 2255, 2428, 3035, 3280, 3608, 4510, 4856, 6070, 6677, 7216, 9020, 9712, 12140, 13354, 18040, 24280, 24887, 26708, 33385, 36080, 48560, 49774, 53416, 66770, 99548, 106832, 124435, 133540, 199096, 248870, 267080, 273757, 398192, 497740, 534160, 547514, 995480, 1095028, 1368785, 1990960, 2190056, 2737570, 4380112, 5475140, 10950280, 21900560]

約数ペア:

[(1, 21900560), (2, 10950280), (4, 5475140), (5, 4380112), (8, 2737570), (10, 2190056), (11, 1990960), (16, 1368785), (20, 1095028), (22, 995480), (40, 547514), (41, 534160), (44, 497740), (55, 398192), (80, 273757), (82, 267080), (88, 248870), (110, 199096), (164, 133540), (176, 124435), (205, 106832), (220, 99548), (328, 66770), (410, 53416), (440, 49774), (451, 48560), (607, 36080), (656, 33385), (820, 26708), (880, 24887), (902, 24280), (1214, 18040), (1640, 13354), (1804, 12140), (2255, 9712), (2428, 9020), (3035, 7216), (3280, 6677), (3608, 6070), (4510, 4856)]