21000724760

素因数分解:

$2^3\times 5^1\times {\mathrm{1399}}^1\times {\mathrm{375281}}^1$

素因数の和:376691

約数の個数: 32

約数和(自身を含む): 47285532000

約数和(自身を除く): 26284807240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1399, 2798, 5596, 6995, 11192, 13990, 27980, 55960, 375281, 750562, 1501124, 1876405, 3002248, 3752810, 7505620, 15011240, 525018119, 1050036238, 2100072476, 2625090595, 4200144952, 5250181190, 10500362380, 21000724760]

約数ペア:

[(1, 21000724760), (2, 10500362380), (4, 5250181190), (5, 4200144952), (8, 2625090595), (10, 2100072476), (20, 1050036238), (40, 525018119), (1399, 15011240), (2798, 7505620), (5596, 3752810), (6995, 3002248), (11192, 1876405), (13990, 1501124), (27980, 750562), (55960, 375281)]