21815540

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^2\times {\mathrm{1297}}^1$

素因数の和:1364

約数の個数: 36

約数和(自身を含む): 47483436

約数和(自身を除く): 25667896

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 841, 1297, 1682, 2594, 3364, 4205, 5188, 6485, 8410, 12970, 16820, 25940, 37613, 75226, 150452, 188065, 376130, 752260, 1090777, 2181554, 4363108, 5453885, 10907770, 21815540]

約数ペア:

[(1, 21815540), (2, 10907770), (4, 5453885), (5, 4363108), (10, 2181554), (20, 1090777), (29, 752260), (58, 376130), (116, 188065), (145, 150452), (290, 75226), (580, 37613), (841, 25940), (1297, 16820), (1682, 12970), (2594, 8410), (3364, 6485), (4205, 5188)]