21211457905

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{47}}^1\times {\mathrm{397}}^1\times {\mathrm{1879}}^1$

素因数の和:2350

約数の個数: 48

約数和(自身を含む): 28660584960

約数和(自身を除く): 7449127055

約数列:

[1, 5, 11, 47, 55, 121, 235, 397, 517, 605, 1879, 1985, 2585, 4367, 5687, 9395, 18659, 20669, 21835, 28435, 48037, 88313, 93295, 103345, 205249, 227359, 240185, 441565, 745963, 971443, 1026245, 1136795, 2257739, 3729815, 4857215, 8205593, 10685873, 11288695, 35060261, 41027965, 53429365, 90261523, 175301305, 385662871, 451307615, 1928314355, 4242291581, 21211457905]

約数ペア:

[(1, 21211457905), (5, 4242291581), (11, 1928314355), (47, 451307615), (55, 385662871), (121, 175301305), (235, 90261523), (397, 53429365), (517, 41027965), (605, 35060261), (1879, 11288695), (1985, 10685873), (2585, 8205593), (4367, 4857215), (5687, 3729815), (9395, 2257739), (18659, 1136795), (20669, 1026245), (21835, 971443), (28435, 745963), (48037, 441565), (88313, 240185), (93295, 227359), (103345, 205249)]