21352940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{3547}}^1$

素因数の和:3606

約数の個数: 48

約数和(自身を含む): 52453632

約数和(自身を除く): 31100692

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 70, 86, 140, 172, 215, 301, 430, 602, 860, 1204, 1505, 3010, 3547, 6020, 7094, 14188, 17735, 24829, 35470, 49658, 70940, 99316, 124145, 152521, 248290, 305042, 496580, 610084, 762605, 1067647, 1525210, 2135294, 3050420, 4270588, 5338235, 10676470, 21352940]

約数ペア:

[(1, 21352940), (2, 10676470), (4, 5338235), (5, 4270588), (7, 3050420), (10, 2135294), (14, 1525210), (20, 1067647), (28, 762605), (35, 610084), (43, 496580), (70, 305042), (86, 248290), (140, 152521), (172, 124145), (215, 99316), (301, 70940), (430, 49658), (602, 35470), (860, 24829), (1204, 17735), (1505, 14188), (3010, 7094), (3547, 6020)]