81558680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{1787}}^1$

素因数の和:1968

約数の個数: 64

約数和(自身を含む): 211127040

約数和(自身を除く): 129568360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 163, 280, 326, 652, 815, 1141, 1304, 1630, 1787, 2282, 3260, 3574, 4564, 5705, 6520, 7148, 8935, 9128, 11410, 12509, 14296, 17870, 22820, 25018, 35740, 45640, 50036, 62545, 71480, 100072, 125090, 250180, 291281, 500360, 582562, 1165124, 1456405, 2038967, 2330248, 2912810, 4077934, 5825620, 8155868, 10194835, 11651240, 16311736, 20389670, 40779340, 81558680]

約数ペア:

[(1, 81558680), (2, 40779340), (4, 20389670), (5, 16311736), (7, 11651240), (8, 10194835), (10, 8155868), (14, 5825620), (20, 4077934), (28, 2912810), (35, 2330248), (40, 2038967), (56, 1456405), (70, 1165124), (140, 582562), (163, 500360), (280, 291281), (326, 250180), (652, 125090), (815, 100072), (1141, 71480), (1304, 62545), (1630, 50036), (1787, 45640), (2282, 35740), (3260, 25018), (3574, 22820), (4564, 17870), (5705, 14296), (6520, 12509), (7148, 11410), (8935, 9128)]