21000827200

素因数分解:

$2^6\times 5^2\times {\mathrm{421}}^1\times {\mathrm{31177}}^1$

素因数の和:31620

約数の個数: 84

約数和(自身を含む): 51799565692

約数和(自身を除く): 30798738492

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 421, 800, 842, 1600, 1684, 2105, 3368, 4210, 6736, 8420, 10525, 13472, 16840, 21050, 26944, 31177, 33680, 42100, 62354, 67360, 84200, 124708, 134720, 155885, 168400, 249416, 311770, 336800, 498832, 623540, 673600, 779425, 997664, 1247080, 1558850, 1995328, 2494160, 3117700, 4988320, 6235400, 9976640, 12470800, 13125517, 24941600, 26251034, 49883200, 52502068, 65627585, 105004136, 131255170, 210008272, 262510340, 328137925, 420016544, 525020680, 656275850, 840033088, 1050041360, 1312551700, 2100082720, 2625103400, 4200165440, 5250206800, 10500413600, 21000827200]

約数ペア:

[(1, 21000827200), (2, 10500413600), (4, 5250206800), (5, 4200165440), (8, 2625103400), (10, 2100082720), (16, 1312551700), (20, 1050041360), (25, 840033088), (32, 656275850), (40, 525020680), (50, 420016544), (64, 328137925), (80, 262510340), (100, 210008272), (160, 131255170), (200, 105004136), (320, 65627585), (400, 52502068), (421, 49883200), (800, 26251034), (842, 24941600), (1600, 13125517), (1684, 12470800), (2105, 9976640), (3368, 6235400), (4210, 4988320), (6736, 3117700), (8420, 2494160), (10525, 1995328), (13472, 1558850), (16840, 1247080), (21050, 997664), (26944, 779425), (31177, 673600), (33680, 623540), (42100, 498832), (62354, 336800), (67360, 311770), (84200, 249416), (124708, 168400), (134720, 155885)]