21515680

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4637}}^1$

素因数の和:4681

約数の個数: 48

約数和(自身を含む): 52594920

約数和(自身を除く): 31079240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 80, 116, 145, 160, 232, 290, 464, 580, 928, 1160, 2320, 4637, 4640, 9274, 18548, 23185, 37096, 46370, 74192, 92740, 134473, 148384, 185480, 268946, 370960, 537892, 672365, 741920, 1075784, 1344730, 2151568, 2689460, 4303136, 5378920, 10757840, 21515680]

約数ペア:

[(1, 21515680), (2, 10757840), (4, 5378920), (5, 4303136), (8, 2689460), (10, 2151568), (16, 1344730), (20, 1075784), (29, 741920), (32, 672365), (40, 537892), (58, 370960), (80, 268946), (116, 185480), (145, 148384), (160, 134473), (232, 92740), (290, 74192), (464, 46370), (580, 37096), (928, 23185), (1160, 18548), (2320, 9274), (4637, 4640)]