81332820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{15581}}^1$

素因数の和:15625

約数の個数: 72

約数和(自身を含む): 255233160

約数和(自身を除く): 173900340

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 45, 58, 60, 87, 90, 116, 145, 174, 180, 261, 290, 348, 435, 522, 580, 870, 1044, 1305, 1740, 2610, 5220, 15581, 31162, 46743, 62324, 77905, 93486, 140229, 155810, 186972, 233715, 280458, 311620, 451849, 467430, 560916, 701145, 903698, 934860, 1355547, 1402290, 1807396, 2259245, 2711094, 2804580, 4066641, 4518490, 5422188, 6777735, 8133282, 9036980, 13555470, 16266564, 20333205, 27110940, 40666410, 81332820]

約数ペア:

[(1, 81332820), (2, 40666410), (3, 27110940), (4, 20333205), (5, 16266564), (6, 13555470), (9, 9036980), (10, 8133282), (12, 6777735), (15, 5422188), (18, 4518490), (20, 4066641), (29, 2804580), (30, 2711094), (36, 2259245), (45, 1807396), (58, 1402290), (60, 1355547), (87, 934860), (90, 903698), (116, 701145), (145, 560916), (174, 467430), (180, 451849), (261, 311620), (290, 280458), (348, 233715), (435, 186972), (522, 155810), (580, 140229), (870, 93486), (1044, 77905), (1305, 62324), (1740, 46743), (2610, 31162), (5220, 15581)]