21451960

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31547}}^1$

素因数の和:31575

約数の個数: 32

約数和(自身を含む): 51107760

約数和(自身を除く): 29655800

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31547, 63094, 126188, 157735, 252376, 315470, 536299, 630940, 1072598, 1261880, 2145196, 2681495, 4290392, 5362990, 10725980, 21451960]

約数ペア:

[(1, 21451960), (2, 10725980), (4, 5362990), (5, 4290392), (8, 2681495), (10, 2145196), (17, 1261880), (20, 1072598), (34, 630940), (40, 536299), (68, 315470), (85, 252376), (136, 157735), (170, 126188), (340, 63094), (680, 31547)]