21298600

素因数分解:

$2^3\times 5^2\times {\mathrm{109}}^1\times {\mathrm{977}}^1$

素因数の和:1102

約数の個数: 48

約数和(自身を含む): 50024700

約数和(自身を除く): 28726100

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 109, 200, 218, 436, 545, 872, 977, 1090, 1954, 2180, 2725, 3908, 4360, 4885, 5450, 7816, 9770, 10900, 19540, 21800, 24425, 39080, 48850, 97700, 106493, 195400, 212986, 425972, 532465, 851944, 1064930, 2129860, 2662325, 4259720, 5324650, 10649300, 21298600]

約数ペア:

[(1, 21298600), (2, 10649300), (4, 5324650), (5, 4259720), (8, 2662325), (10, 2129860), (20, 1064930), (25, 851944), (40, 532465), (50, 425972), (100, 212986), (109, 195400), (200, 106493), (218, 97700), (436, 48850), (545, 39080), (872, 24425), (977, 21800), (1090, 19540), (1954, 10900), (2180, 9770), (2725, 7816), (3908, 5450), (4360, 4885)]