640526224

素因数分解:

$2^4\times {\mathrm{13}}^2\times {\mathrm{236881}}^1$

素因数の和:236915

約数の個数: 30

約数和(自身を含む): 1343831586

約数和(自身を除く): 703305362

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 169, 208, 338, 676, 1352, 2704, 236881, 473762, 947524, 1895048, 3079453, 3790096, 6158906, 12317812, 24635624, 40032889, 49271248, 80065778, 160131556, 320263112, 640526224]

約数ペア:

[(1, 640526224), (2, 320263112), (4, 160131556), (8, 80065778), (13, 49271248), (16, 40032889), (26, 24635624), (52, 12317812), (104, 6158906), (169, 3790096), (208, 3079453), (338, 1895048), (676, 947524), (1352, 473762), (2704, 236881)]