20018200

素因数分解:

$2^3\times 5^2\times {\mathrm{101}}^1\times {\mathrm{991}}^1$

素因数の和:1108

約数の個数: 48

約数和(自身を含む): 47050560

約数和(自身を除く): 27032360

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 101, 200, 202, 404, 505, 808, 991, 1010, 1982, 2020, 2525, 3964, 4040, 4955, 5050, 7928, 9910, 10100, 19820, 20200, 24775, 39640, 49550, 99100, 100091, 198200, 200182, 400364, 500455, 800728, 1000910, 2001820, 2502275, 4003640, 5004550, 10009100, 20018200]

約数ペア:

[(1, 20018200), (2, 10009100), (4, 5004550), (5, 4003640), (8, 2502275), (10, 2001820), (20, 1000910), (25, 800728), (40, 500455), (50, 400364), (100, 200182), (101, 198200), (200, 100091), (202, 99100), (404, 49550), (505, 39640), (808, 24775), (991, 20200), (1010, 19820), (1982, 10100), (2020, 9910), (2525, 7928), (3964, 5050), (4040, 4955)]