640994992

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{33413}}^1$

素因数の和:33541

約数の個数: 40

約数和(自身を含む): 1367300880

約数和(自身を除く): 726305888

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 109, 176, 218, 436, 872, 1199, 1744, 2398, 4796, 9592, 19184, 33413, 66826, 133652, 267304, 367543, 534608, 735086, 1470172, 2940344, 3642017, 5880688, 7284034, 14568068, 29136136, 40062187, 58272272, 80124374, 160248748, 320497496, 640994992]

約数ペア:

[(1, 640994992), (2, 320497496), (4, 160248748), (8, 80124374), (11, 58272272), (16, 40062187), (22, 29136136), (44, 14568068), (88, 7284034), (109, 5880688), (176, 3642017), (218, 2940344), (436, 1470172), (872, 735086), (1199, 534608), (1744, 367543), (2398, 267304), (4796, 133652), (9592, 66826), (19184, 33413)]