81658870

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{263}}^1\times {\mathrm{509}}^1$

素因数の和:840

約数の個数: 32

約数和(自身を含む): 150258240

約数和(自身を除く): 68599370

約数列:

[1, 2, 5, 10, 61, 122, 263, 305, 509, 526, 610, 1018, 1315, 2545, 2630, 5090, 16043, 31049, 32086, 62098, 80215, 133867, 155245, 160430, 267734, 310490, 669335, 1338670, 8165887, 16331774, 40829435, 81658870]

約数ペア:

[(1, 81658870), (2, 40829435), (5, 16331774), (10, 8165887), (61, 1338670), (122, 669335), (263, 310490), (305, 267734), (509, 160430), (526, 155245), (610, 133867), (1018, 80215), (1315, 62098), (2545, 32086), (2630, 31049), (5090, 16043)]