21546320

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6569}}^1$

素因数の和:6623

約数の個数: 40

約数和(自身を含む): 51324840

約数和(自身を除く): 29778520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6569, 13138, 26276, 32845, 52552, 65690, 105104, 131380, 262760, 269329, 525520, 538658, 1077316, 1346645, 2154632, 2693290, 4309264, 5386580, 10773160, 21546320]

約数ペア:

[(1, 21546320), (2, 10773160), (4, 5386580), (5, 4309264), (8, 2693290), (10, 2154632), (16, 1346645), (20, 1077316), (40, 538658), (41, 525520), (80, 269329), (82, 262760), (164, 131380), (205, 105104), (328, 65690), (410, 52552), (656, 32845), (820, 26276), (1640, 13138), (3280, 6569)]