21515440

素因数分解:

$2^4\times 5^1\times {\mathrm{131}}^1\times {\mathrm{2053}}^1$

素因数の和:2197

約数の個数: 40

約数和(自身を含む): 50429808

約数和(自身を除く): 28914368

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 131, 262, 524, 655, 1048, 1310, 2053, 2096, 2620, 4106, 5240, 8212, 10265, 10480, 16424, 20530, 32848, 41060, 82120, 164240, 268943, 537886, 1075772, 1344715, 2151544, 2689430, 4303088, 5378860, 10757720, 21515440]

約数ペア:

[(1, 21515440), (2, 10757720), (4, 5378860), (5, 4303088), (8, 2689430), (10, 2151544), (16, 1344715), (20, 1075772), (40, 537886), (80, 268943), (131, 164240), (262, 82120), (524, 41060), (655, 32848), (1048, 20530), (1310, 16424), (2053, 10480), (2096, 10265), (2620, 8212), (4106, 5240)]