20853080

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{251}}^1$

素因数の和:360

約数の個数: 64

約数和(自身を含む): 49351680

約数和(自身を除く): 28498600

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 67, 124, 134, 155, 248, 251, 268, 310, 335, 502, 536, 620, 670, 1004, 1240, 1255, 1340, 2008, 2077, 2510, 2680, 4154, 5020, 7781, 8308, 10040, 10385, 15562, 16616, 16817, 20770, 31124, 33634, 38905, 41540, 62248, 67268, 77810, 83080, 84085, 134536, 155620, 168170, 311240, 336340, 521327, 672680, 1042654, 2085308, 2606635, 4170616, 5213270, 10426540, 20853080]

約数ペア:

[(1, 20853080), (2, 10426540), (4, 5213270), (5, 4170616), (8, 2606635), (10, 2085308), (20, 1042654), (31, 672680), (40, 521327), (62, 336340), (67, 311240), (124, 168170), (134, 155620), (155, 134536), (248, 84085), (251, 83080), (268, 77810), (310, 67268), (335, 62248), (502, 41540), (536, 38905), (620, 33634), (670, 31124), (1004, 20770), (1240, 16817), (1255, 16616), (1340, 15562), (2008, 10385), (2077, 10040), (2510, 8308), (2680, 7781), (4154, 5020)]