21260490

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{16481}}^1$

素因数の和:16534

約数の個数: 32

約数和(自身を含む): 52214976

約数和(自身を除く): 30954486

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 43, 86, 129, 215, 258, 430, 645, 1290, 16481, 32962, 49443, 82405, 98886, 164810, 247215, 494430, 708683, 1417366, 2126049, 3543415, 4252098, 7086830, 10630245, 21260490]

約数ペア:

[(1, 21260490), (2, 10630245), (3, 7086830), (5, 4252098), (6, 3543415), (10, 2126049), (15, 1417366), (30, 708683), (43, 494430), (86, 247215), (129, 164810), (215, 98886), (258, 82405), (430, 49443), (645, 32962), (1290, 16481)]