25678540

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{499}}^1$

素因数の和:622

約数の個数: 48

約数和(自身を含む): 56448000

約数和(自身を除く): 30769460

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 83, 124, 155, 166, 310, 332, 415, 499, 620, 830, 998, 1660, 1996, 2495, 2573, 4990, 5146, 9980, 10292, 12865, 15469, 25730, 30938, 41417, 51460, 61876, 77345, 82834, 154690, 165668, 207085, 309380, 414170, 828340, 1283927, 2567854, 5135708, 6419635, 12839270, 25678540]

約数ペア:

[(1, 25678540), (2, 12839270), (4, 6419635), (5, 5135708), (10, 2567854), (20, 1283927), (31, 828340), (62, 414170), (83, 309380), (124, 207085), (155, 165668), (166, 154690), (310, 82834), (332, 77345), (415, 61876), (499, 51460), (620, 41417), (830, 30938), (998, 25730), (1660, 15469), (1996, 12865), (2495, 10292), (2573, 9980), (4990, 5146)]