21741850

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{83}}^1$

素因数の和:152

約数の個数: 72

約数和(自身を含む): 45747072

約数和(自身を除く): 24005222

約数列:

[1, 2, 5, 10, 13, 25, 26, 31, 50, 62, 65, 83, 130, 155, 166, 169, 310, 325, 338, 403, 415, 650, 775, 806, 830, 845, 1079, 1550, 1690, 2015, 2075, 2158, 2573, 4030, 4150, 4225, 5146, 5239, 5395, 8450, 10075, 10478, 10790, 12865, 14027, 20150, 25730, 26195, 26975, 28054, 33449, 52390, 53950, 64325, 66898, 70135, 128650, 130975, 140270, 167245, 261950, 334490, 350675, 434837, 701350, 836225, 869674, 1672450, 2174185, 4348370, 10870925, 21741850]

約数ペア:

[(1, 21741850), (2, 10870925), (5, 4348370), (10, 2174185), (13, 1672450), (25, 869674), (26, 836225), (31, 701350), (50, 434837), (62, 350675), (65, 334490), (83, 261950), (130, 167245), (155, 140270), (166, 130975), (169, 128650), (310, 70135), (325, 66898), (338, 64325), (403, 53950), (415, 52390), (650, 33449), (775, 28054), (806, 26975), (830, 26195), (845, 25730), (1079, 20150), (1550, 14027), (1690, 12865), (2015, 10790), (2075, 10478), (2158, 10075), (2573, 8450), (4030, 5395), (4150, 5239), (4225, 5146)]