21806680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{4099}}^1$

素因数の和:4136

約数の個数: 64

約数和(自身を含む): 59040000

約数和(自身を除く): 37233320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 56, 70, 76, 95, 133, 140, 152, 190, 266, 280, 380, 532, 665, 760, 1064, 1330, 2660, 4099, 5320, 8198, 16396, 20495, 28693, 32792, 40990, 57386, 77881, 81980, 114772, 143465, 155762, 163960, 229544, 286930, 311524, 389405, 545167, 573860, 623048, 778810, 1090334, 1147720, 1557620, 2180668, 2725835, 3115240, 4361336, 5451670, 10903340, 21806680]

約数ペア:

[(1, 21806680), (2, 10903340), (4, 5451670), (5, 4361336), (7, 3115240), (8, 2725835), (10, 2180668), (14, 1557620), (19, 1147720), (20, 1090334), (28, 778810), (35, 623048), (38, 573860), (40, 545167), (56, 389405), (70, 311524), (76, 286930), (95, 229544), (133, 163960), (140, 155762), (152, 143465), (190, 114772), (266, 81980), (280, 77881), (380, 57386), (532, 40990), (665, 32792), (760, 28693), (1064, 20495), (1330, 16396), (2660, 8198), (4099, 5320)]