19993820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{12983}}^1$

素因数の和:13010

約数の個数: 48

約数和(自身を含む): 52351488

約数和(自身を除く): 32357668

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 12983, 25966, 51932, 64915, 90881, 129830, 142813, 181762, 259660, 285626, 363524, 454405, 571252, 714065, 908810, 999691, 1428130, 1817620, 1999382, 2856260, 3998764, 4998455, 9996910, 19993820]

約数ペア:

[(1, 19993820), (2, 9996910), (4, 4998455), (5, 3998764), (7, 2856260), (10, 1999382), (11, 1817620), (14, 1428130), (20, 999691), (22, 908810), (28, 714065), (35, 571252), (44, 454405), (55, 363524), (70, 285626), (77, 259660), (110, 181762), (140, 142813), (154, 129830), (220, 90881), (308, 64915), (385, 51932), (770, 25966), (1540, 12983)]