20785864

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{109}}^1\times {\mathrm{197}}^1$

素因数の和:334

約数の個数: 48

約数和(自身を含む): 43451100

約数和(自身を除く): 22665236

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 109, 121, 197, 218, 242, 394, 436, 484, 788, 872, 968, 1199, 1576, 2167, 2398, 4334, 4796, 8668, 9592, 13189, 17336, 21473, 23837, 26378, 42946, 47674, 52756, 85892, 95348, 105512, 171784, 190696, 236203, 472406, 944812, 1889624, 2598233, 5196466, 10392932, 20785864]

約数ペア:

[(1, 20785864), (2, 10392932), (4, 5196466), (8, 2598233), (11, 1889624), (22, 944812), (44, 472406), (88, 236203), (109, 190696), (121, 171784), (197, 105512), (218, 95348), (242, 85892), (394, 52756), (436, 47674), (484, 42946), (788, 26378), (872, 23837), (968, 21473), (1199, 17336), (1576, 13189), (2167, 9592), (2398, 8668), (4334, 4796)]