20494740

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{6971}}^1$

素因数の和:6997

約数の個数: 72

約数和(自身を含む): 66763872

約数和(自身を除く): 46269132

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 6971, 13942, 20913, 27884, 34855, 41826, 48797, 69710, 83652, 97594, 104565, 139420, 146391, 195188, 209130, 243985, 292782, 341579, 418260, 487970, 585564, 683158, 731955, 975940, 1024737, 1366316, 1463910, 1707895, 2049474, 2927820, 3415790, 4098948, 5123685, 6831580, 10247370, 20494740]

約数ペア:

[(1, 20494740), (2, 10247370), (3, 6831580), (4, 5123685), (5, 4098948), (6, 3415790), (7, 2927820), (10, 2049474), (12, 1707895), (14, 1463910), (15, 1366316), (20, 1024737), (21, 975940), (28, 731955), (30, 683158), (35, 585564), (42, 487970), (49, 418260), (60, 341579), (70, 292782), (84, 243985), (98, 209130), (105, 195188), (140, 146391), (147, 139420), (196, 104565), (210, 97594), (245, 83652), (294, 69710), (420, 48797), (490, 41826), (588, 34855), (735, 27884), (980, 20913), (1470, 13942), (2940, 6971)]