81447940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{4441}}^1$

素因数の和:4588

約数の個数: 48

約数和(自身を含む): 197011584

約数和(自身を除く): 115563644

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 131, 140, 262, 524, 655, 917, 1310, 1834, 2620, 3668, 4441, 4585, 8882, 9170, 17764, 18340, 22205, 31087, 44410, 62174, 88820, 124348, 155435, 310870, 581771, 621740, 1163542, 2327084, 2908855, 4072397, 5817710, 8144794, 11635420, 16289588, 20361985, 40723970, 81447940]

約数ペア:

[(1, 81447940), (2, 40723970), (4, 20361985), (5, 16289588), (7, 11635420), (10, 8144794), (14, 5817710), (20, 4072397), (28, 2908855), (35, 2327084), (70, 1163542), (131, 621740), (140, 581771), (262, 310870), (524, 155435), (655, 124348), (917, 88820), (1310, 62174), (1834, 44410), (2620, 31087), (3668, 22205), (4441, 18340), (4585, 17764), (8882, 9170)]