20999770

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^2\times {\mathrm{227}}^1$

素因数の和:303

約数の個数: 48

約数和(自身を含む): 42895008

約数和(自身を除く): 21895238

約数列:

[1, 2, 5, 10, 11, 22, 29, 55, 58, 110, 145, 227, 290, 319, 454, 638, 841, 1135, 1595, 1682, 2270, 2497, 3190, 4205, 4994, 6583, 8410, 9251, 12485, 13166, 18502, 24970, 32915, 46255, 65830, 72413, 92510, 144826, 190907, 362065, 381814, 724130, 954535, 1909070, 2099977, 4199954, 10499885, 20999770]

約数ペア:

[(1, 20999770), (2, 10499885), (5, 4199954), (10, 2099977), (11, 1909070), (22, 954535), (29, 724130), (55, 381814), (58, 362065), (110, 190907), (145, 144826), (227, 92510), (290, 72413), (319, 65830), (454, 46255), (638, 32915), (841, 24970), (1135, 18502), (1595, 13166), (1682, 12485), (2270, 9251), (2497, 8410), (3190, 6583), (4205, 4994)]