640086664

素因数分解:

$2^3\times 7^1\times {\mathrm{61}}^1\times {\mathrm{187379}}^1$

素因数の和:187453

約数の個数: 32

約数和(自身を含む): 1394107200

約数和(自身を除く): 754020536

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 61, 122, 244, 427, 488, 854, 1708, 3416, 187379, 374758, 749516, 1311653, 1499032, 2623306, 5246612, 10493224, 11430119, 22860238, 45720476, 80010833, 91440952, 160021666, 320043332, 640086664]

約数ペア:

[(1, 640086664), (2, 320043332), (4, 160021666), (7, 91440952), (8, 80010833), (14, 45720476), (28, 22860238), (56, 11430119), (61, 10493224), (122, 5246612), (244, 2623306), (427, 1499032), (488, 1311653), (854, 749516), (1708, 374758), (3416, 187379)]