21148640

素因数分解:

$2^5\times 5^1\times {\mathrm{131}}^1\times {\mathrm{1009}}^1$

素因数の和:1155

約数の個数: 48

約数和(自身を含む): 50394960

約数和(自身を除く): 29246320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 131, 160, 262, 524, 655, 1009, 1048, 1310, 2018, 2096, 2620, 4036, 4192, 5045, 5240, 8072, 10090, 10480, 16144, 20180, 20960, 32288, 40360, 80720, 132179, 161440, 264358, 528716, 660895, 1057432, 1321790, 2114864, 2643580, 4229728, 5287160, 10574320, 21148640]

約数ペア:

[(1, 21148640), (2, 10574320), (4, 5287160), (5, 4229728), (8, 2643580), (10, 2114864), (16, 1321790), (20, 1057432), (32, 660895), (40, 528716), (80, 264358), (131, 161440), (160, 132179), (262, 80720), (524, 40360), (655, 32288), (1009, 20960), (1048, 20180), (1310, 16144), (2018, 10480), (2096, 10090), (2620, 8072), (4036, 5240), (4192, 5045)]