21242960

素因数分解:

$2^4\times 5^1\times {\mathrm{131}}^1\times {\mathrm{2027}}^1$

素因数の和:2171

約数の個数: 40

約数和(自身を含む): 49791456

約数和(自身を除く): 28548496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 131, 262, 524, 655, 1048, 1310, 2027, 2096, 2620, 4054, 5240, 8108, 10135, 10480, 16216, 20270, 32432, 40540, 81080, 162160, 265537, 531074, 1062148, 1327685, 2124296, 2655370, 4248592, 5310740, 10621480, 21242960]

約数ペア:

[(1, 21242960), (2, 10621480), (4, 5310740), (5, 4248592), (8, 2655370), (10, 2124296), (16, 1327685), (20, 1062148), (40, 531074), (80, 265537), (131, 162160), (262, 81080), (524, 40540), (655, 32432), (1048, 20270), (1310, 16216), (2027, 10480), (2096, 10135), (2620, 8108), (4054, 5240)]