640424043

素因数分解:

$3^3\times 7^1\times {\mathrm{127}}^1\times {\mathrm{26681}}^1$

素因数の和:26824

約数の個数: 32

約数和(自身を含む): 1092894720

約数和(自身を除く): 452470677

約数列:

[1, 3, 7, 9, 21, 27, 63, 127, 189, 381, 889, 1143, 2667, 3429, 8001, 24003, 26681, 80043, 186767, 240129, 560301, 720387, 1680903, 3388487, 5042709, 10165461, 23719409, 30496383, 71158227, 91489149, 213474681, 640424043]

約数ペア:

[(1, 640424043), (3, 213474681), (7, 91489149), (9, 71158227), (21, 30496383), (27, 23719409), (63, 10165461), (127, 5042709), (189, 3388487), (381, 1680903), (889, 720387), (1143, 560301), (2667, 240129), (3429, 186767), (8001, 80043), (24003, 26681)]