12897710900

素因数分解:

$2^2\times 5^2\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{20411}}^1$

素因数の和:20585

約数の個数: 72

約数和(自身を含む): 28702537920

約数和(自身を除く): 15804827020

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 71, 89, 100, 142, 178, 284, 355, 356, 445, 710, 890, 1420, 1775, 1780, 2225, 3550, 4450, 6319, 7100, 8900, 12638, 20411, 25276, 31595, 40822, 63190, 81644, 102055, 126380, 157975, 204110, 315950, 408220, 510275, 631900, 1020550, 1449181, 1816579, 2041100, 2898362, 3633158, 5796724, 7245905, 7266316, 9082895, 14491810, 18165790, 28983620, 36229525, 36331580, 45414475, 72459050, 90828950, 128977109, 144918100, 181657900, 257954218, 515908436, 644885545, 1289771090, 2579542180, 3224427725, 6448855450, 12897710900]

約数ペア:

[(1, 12897710900), (2, 6448855450), (4, 3224427725), (5, 2579542180), (10, 1289771090), (20, 644885545), (25, 515908436), (50, 257954218), (71, 181657900), (89, 144918100), (100, 128977109), (142, 90828950), (178, 72459050), (284, 45414475), (355, 36331580), (356, 36229525), (445, 28983620), (710, 18165790), (890, 14491810), (1420, 9082895), (1775, 7266316), (1780, 7245905), (2225, 5796724), (3550, 3633158), (4450, 2898362), (6319, 2041100), (7100, 1816579), (8900, 1449181), (12638, 1020550), (20411, 631900), (25276, 510275), (31595, 408220), (40822, 315950), (63190, 204110), (81644, 157975), (102055, 126380)]