28408887

素因数分解:

$3^5\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^2$

素因数の和:91

約数の個数: 72

約数和(自身を含む): 50725584

約数和(自身を除く): 22316697

約数列:

[1, 3, 9, 13, 17, 23, 27, 39, 51, 69, 81, 117, 153, 207, 221, 243, 299, 351, 391, 459, 529, 621, 663, 897, 1053, 1173, 1377, 1587, 1863, 1989, 2691, 3159, 3519, 4131, 4761, 5083, 5589, 5967, 6877, 8073, 8993, 10557, 14283, 15249, 17901, 20631, 24219, 26979, 31671, 42849, 45747, 53703, 61893, 72657, 80937, 95013, 116909, 128547, 137241, 185679, 242811, 350727, 411723, 557037, 728433, 1052181, 1235169, 1671111, 2185299, 3156543, 9469629, 28408887]

約数ペア:

[(1, 28408887), (3, 9469629), (9, 3156543), (13, 2185299), (17, 1671111), (23, 1235169), (27, 1052181), (39, 728433), (51, 557037), (69, 411723), (81, 350727), (117, 242811), (153, 185679), (207, 137241), (221, 128547), (243, 116909), (299, 95013), (351, 80937), (391, 72657), (459, 61893), (529, 53703), (621, 45747), (663, 42849), (897, 31671), (1053, 26979), (1173, 24219), (1377, 20631), (1587, 17901), (1863, 15249), (1989, 14283), (2691, 10557), (3159, 8993), (3519, 8073), (4131, 6877), (4761, 5967), (5083, 5589)]