21231390

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{103}}^1\times {\mathrm{6871}}^1$

素因数の和:6984

約数の個数: 32

約数和(自身を含む): 51457536

約数和(自身を除く): 30226146

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 103, 206, 309, 515, 618, 1030, 1545, 3090, 6871, 13742, 20613, 34355, 41226, 68710, 103065, 206130, 707713, 1415426, 2123139, 3538565, 4246278, 7077130, 10615695, 21231390]

約数ペア:

[(1, 21231390), (2, 10615695), (3, 7077130), (5, 4246278), (6, 3538565), (10, 2123139), (15, 1415426), (30, 707713), (103, 206130), (206, 103065), (309, 68710), (515, 41226), (618, 34355), (1030, 20613), (1545, 13742), (3090, 6871)]