21471380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1489}}^1$

素因数の和:1608

約数の個数: 48

約数和(自身を含む): 52066560

約数和(自身を除く): 30595180

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 103, 140, 206, 412, 515, 721, 1030, 1442, 1489, 2060, 2884, 2978, 3605, 5956, 7210, 7445, 10423, 14420, 14890, 20846, 29780, 41692, 52115, 104230, 153367, 208460, 306734, 613468, 766835, 1073569, 1533670, 2147138, 3067340, 4294276, 5367845, 10735690, 21471380]

約数ペア:

[(1, 21471380), (2, 10735690), (4, 5367845), (5, 4294276), (7, 3067340), (10, 2147138), (14, 1533670), (20, 1073569), (28, 766835), (35, 613468), (70, 306734), (103, 208460), (140, 153367), (206, 104230), (412, 52115), (515, 41692), (721, 29780), (1030, 20846), (1442, 14890), (1489, 14420), (2060, 10423), (2884, 7445), (2978, 7210), (3605, 5956)]