20210820175

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{263}}^1\times {\mathrm{1987}}^1$

素因数の和:2297

約数の個数: 96

約数和(自身を含む): 32799900672

約数和(自身を除く): 12589080497

約数列:

[1, 5, 7, 13, 17, 25, 35, 65, 85, 91, 119, 175, 221, 263, 325, 425, 455, 595, 1105, 1315, 1547, 1841, 1987, 2275, 2975, 3419, 4471, 5525, 6575, 7735, 9205, 9935, 13909, 17095, 22355, 23933, 25831, 31297, 33779, 38675, 46025, 49675, 58123, 69545, 85475, 111775, 119665, 129155, 156485, 168895, 180817, 236453, 290615, 347725, 406861, 439127, 522581, 598325, 645775, 782425, 844475, 904085, 1182265, 1453075, 2034305, 2195635, 2612905, 3073889, 3658067, 4520425, 5911325, 6793553, 8883877, 10171525, 10978175, 13064525, 15369445, 18290335, 33967765, 44419385, 47554871, 62187139, 76847225, 91451675, 115490401, 169838825, 222096925, 237774355, 310935695, 577452005, 808432807, 1188871775, 1554678475, 2887260025, 4042164035, 20210820175]

約数ペア:

[(1, 20210820175), (5, 4042164035), (7, 2887260025), (13, 1554678475), (17, 1188871775), (25, 808432807), (35, 577452005), (65, 310935695), (85, 237774355), (91, 222096925), (119, 169838825), (175, 115490401), (221, 91451675), (263, 76847225), (325, 62187139), (425, 47554871), (455, 44419385), (595, 33967765), (1105, 18290335), (1315, 15369445), (1547, 13064525), (1841, 10978175), (1987, 10171525), (2275, 8883877), (2975, 6793553), (3419, 5911325), (4471, 4520425), (5525, 3658067), (6575, 3073889), (7735, 2612905), (9205, 2195635), (9935, 2034305), (13909, 1453075), (17095, 1182265), (22355, 904085), (23933, 844475), (25831, 782425), (31297, 645775), (33779, 598325), (38675, 522581), (46025, 439127), (49675, 406861), (58123, 347725), (69545, 290615), (85475, 236453), (111775, 180817), (119665, 168895), (129155, 156485)]