21365920

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{3257}}^1$

素因数の和:3313

約数の個数: 48

約数和(自身を含む): 51724008

約数和(自身を除く): 30358088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 160, 164, 205, 328, 410, 656, 820, 1312, 1640, 3257, 3280, 6514, 6560, 13028, 16285, 26056, 32570, 52112, 65140, 104224, 130280, 133537, 260560, 267074, 521120, 534148, 667685, 1068296, 1335370, 2136592, 2670740, 4273184, 5341480, 10682960, 21365920]

約数ペア:

[(1, 21365920), (2, 10682960), (4, 5341480), (5, 4273184), (8, 2670740), (10, 2136592), (16, 1335370), (20, 1068296), (32, 667685), (40, 534148), (41, 521120), (80, 267074), (82, 260560), (160, 133537), (164, 130280), (205, 104224), (328, 65140), (410, 52112), (656, 32570), (820, 26056), (1312, 16285), (1640, 13028), (3257, 6560), (3280, 6514)]