20204560

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8147}}^1$

素因数の和:8191

約数の個数: 40

約数和(自身を含む): 48496896

約数和(自身を除く): 28292336

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8147, 16294, 32588, 40735, 65176, 81470, 130352, 162940, 252557, 325880, 505114, 651760, 1010228, 1262785, 2020456, 2525570, 4040912, 5051140, 10102280, 20204560]

約数ペア:

[(1, 20204560), (2, 10102280), (4, 5051140), (5, 4040912), (8, 2525570), (10, 2020456), (16, 1262785), (20, 1010228), (31, 651760), (40, 505114), (62, 325880), (80, 252557), (124, 162940), (155, 130352), (248, 81470), (310, 65176), (496, 40735), (620, 32588), (1240, 16294), (2480, 8147)]