20478870

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1637}}^1$

素因数の和:1789

約数の個数: 48

約数和(自身を含む): 53660880

約数和(自身を除く): 33182010

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 139, 278, 417, 695, 834, 1251, 1390, 1637, 2085, 2502, 3274, 4170, 4911, 6255, 8185, 9822, 12510, 14733, 16370, 24555, 29466, 49110, 73665, 147330, 227543, 455086, 682629, 1137715, 1365258, 2047887, 2275430, 3413145, 4095774, 6826290, 10239435, 20478870]

約数ペア:

[(1, 20478870), (2, 10239435), (3, 6826290), (5, 4095774), (6, 3413145), (9, 2275430), (10, 2047887), (15, 1365258), (18, 1137715), (30, 682629), (45, 455086), (90, 227543), (139, 147330), (278, 73665), (417, 49110), (695, 29466), (834, 24555), (1251, 16370), (1390, 14733), (1637, 12510), (2085, 9822), (2502, 8185), (3274, 6255), (4170, 4911)]