21972140

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{881}}^1$

素因数の和:962

約数の個数: 48

約数和(自身を含む): 48898080

約数和(自身を除く): 26925940

約数列:

[1, 2, 4, 5, 10, 20, 29, 43, 58, 86, 116, 145, 172, 215, 290, 430, 580, 860, 881, 1247, 1762, 2494, 3524, 4405, 4988, 6235, 8810, 12470, 17620, 24940, 25549, 37883, 51098, 75766, 102196, 127745, 151532, 189415, 255490, 378830, 510980, 757660, 1098607, 2197214, 4394428, 5493035, 10986070, 21972140]

約数ペア:

[(1, 21972140), (2, 10986070), (4, 5493035), (5, 4394428), (10, 2197214), (20, 1098607), (29, 757660), (43, 510980), (58, 378830), (86, 255490), (116, 189415), (145, 151532), (172, 127745), (215, 102196), (290, 75766), (430, 51098), (580, 37883), (860, 25549), (881, 24940), (1247, 17620), (1762, 12470), (2494, 8810), (3524, 6235), (4405, 4988)]