278778890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{49871}}^1$

素因数の和:49934

約数の個数: 32

約数和(自身を含む): 552980736

約数和(自身を除く): 274201846

約数列:

[1, 2, 5, 10, 13, 26, 43, 65, 86, 130, 215, 430, 559, 1118, 2795, 5590, 49871, 99742, 249355, 498710, 648323, 1296646, 2144453, 3241615, 4288906, 6483230, 10722265, 21444530, 27877889, 55755778, 139389445, 278778890]

約数ペア:

[(1, 278778890), (2, 139389445), (5, 55755778), (10, 27877889), (13, 21444530), (26, 10722265), (43, 6483230), (65, 4288906), (86, 3241615), (130, 2144453), (215, 1296646), (430, 648323), (559, 498710), (1118, 249355), (2795, 99742), (5590, 49871)]