1291286320

素因数分解:

$2^4\times 5^1\times {\mathrm{3881}}^1\times {\mathrm{4159}}^1$

素因数の和:8053

約数の個数: 40

約数和(自身を含む): 3003736320

約数和(自身を除く): 1712450000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3881, 4159, 7762, 8318, 15524, 16636, 19405, 20795, 31048, 33272, 38810, 41590, 62096, 66544, 77620, 83180, 155240, 166360, 310480, 332720, 16141079, 32282158, 64564316, 80705395, 129128632, 161410790, 258257264, 322821580, 645643160, 1291286320]

約数ペア:

[(1, 1291286320), (2, 645643160), (4, 322821580), (5, 258257264), (8, 161410790), (10, 129128632), (16, 80705395), (20, 64564316), (40, 32282158), (80, 16141079), (3881, 332720), (4159, 310480), (7762, 166360), (8318, 155240), (15524, 83180), (16636, 77620), (19405, 66544), (20795, 62096), (31048, 41590), (33272, 38810)]