20027980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{4933}}^1$

素因数の和:4978

約数の個数: 48

約数和(自身を含む): 49734720

約数和(自身を除く): 29706740

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 4933, 9866, 19732, 24665, 34531, 49330, 69062, 98660, 138124, 143057, 172655, 286114, 345310, 572228, 690620, 715285, 1001399, 1430570, 2002798, 2861140, 4005596, 5006995, 10013990, 20027980]

約数ペア:

[(1, 20027980), (2, 10013990), (4, 5006995), (5, 4005596), (7, 2861140), (10, 2002798), (14, 1430570), (20, 1001399), (28, 715285), (29, 690620), (35, 572228), (58, 345310), (70, 286114), (116, 172655), (140, 143057), (145, 138124), (203, 98660), (290, 69062), (406, 49330), (580, 34531), (812, 24665), (1015, 19732), (2030, 9866), (4060, 4933)]