20021890

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{1409}}^1$

素因数の和:1459

約数の個数: 48

約数和(自身を含む): 43399800

約数和(自身を除く): 23377910

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 49, 58, 70, 98, 145, 203, 245, 290, 406, 490, 1015, 1409, 1421, 2030, 2818, 2842, 7045, 7105, 9863, 14090, 14210, 19726, 40861, 49315, 69041, 81722, 98630, 138082, 204305, 286027, 345205, 408610, 572054, 690410, 1430135, 2002189, 2860270, 4004378, 10010945, 20021890]

約数ペア:

[(1, 20021890), (2, 10010945), (5, 4004378), (7, 2860270), (10, 2002189), (14, 1430135), (29, 690410), (35, 572054), (49, 408610), (58, 345205), (70, 286027), (98, 204305), (145, 138082), (203, 98630), (245, 81722), (290, 69041), (406, 49315), (490, 40861), (1015, 19726), (1409, 14210), (1421, 14090), (2030, 9863), (2818, 7105), (2842, 7045)]