81880715

素因数分解:

$5^1\times 7^2\times {\mathrm{149}}^1\times {\mathrm{2243}}^1$

素因数の和:2411

約数の個数: 24

約数和(自身を含む): 115117200

約数和(自身を除く): 33236485

約数列:

[1, 5, 7, 35, 49, 149, 245, 745, 1043, 2243, 5215, 7301, 11215, 15701, 36505, 78505, 109907, 334207, 549535, 1671035, 2339449, 11697245, 16376143, 81880715]

約数ペア:

[(1, 81880715), (5, 16376143), (7, 11697245), (35, 2339449), (49, 1671035), (149, 549535), (245, 334207), (745, 109907), (1043, 78505), (2243, 36505), (5215, 15701), (7301, 11215)]