21911725

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:190

約数の個数: 48

約数和(自身を含む): 32408640

約数和(自身を除く): 10496915

約数列:

[1, 5, 11, 17, 25, 43, 55, 85, 109, 187, 215, 275, 425, 473, 545, 731, 935, 1075, 1199, 1853, 2365, 2725, 3655, 4675, 4687, 5995, 8041, 9265, 11825, 18275, 20383, 23435, 29975, 40205, 46325, 51557, 79679, 101915, 117175, 201025, 257785, 398395, 509575, 876469, 1288925, 1991975, 4382345, 21911725]

約数ペア:

[(1, 21911725), (5, 4382345), (11, 1991975), (17, 1288925), (25, 876469), (43, 509575), (55, 398395), (85, 257785), (109, 201025), (187, 117175), (215, 101915), (275, 79679), (425, 51557), (473, 46325), (545, 40205), (731, 29975), (935, 23435), (1075, 20383), (1199, 18275), (1853, 11825), (2365, 9265), (2725, 8041), (3655, 5995), (4675, 4687)]