21949240

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^2\times {\mathrm{571}}^1$

素因数の和:644

約数の個数: 48

約数和(自身を含む): 51119640

約数和(自身を除く): 29170400

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 571, 620, 961, 1142, 1240, 1922, 2284, 2855, 3844, 4568, 4805, 5710, 7688, 9610, 11420, 17701, 19220, 22840, 35402, 38440, 70804, 88505, 141608, 177010, 354020, 548731, 708040, 1097462, 2194924, 2743655, 4389848, 5487310, 10974620, 21949240]

約数ペア:

[(1, 21949240), (2, 10974620), (4, 5487310), (5, 4389848), (8, 2743655), (10, 2194924), (20, 1097462), (31, 708040), (40, 548731), (62, 354020), (124, 177010), (155, 141608), (248, 88505), (310, 70804), (571, 38440), (620, 35402), (961, 22840), (1142, 19220), (1240, 17701), (1922, 11420), (2284, 9610), (2855, 7688), (3844, 5710), (4568, 4805)]