20009900

素因数分解:

$2^2\times 5^2\times {\mathrm{401}}^1\times {\mathrm{499}}^1$

素因数の和:914

約数の個数: 36

約数和(自身を含む): 43617000

約数和(自身を除く): 23607100

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 401, 499, 802, 998, 1604, 1996, 2005, 2495, 4010, 4990, 8020, 9980, 10025, 12475, 20050, 24950, 40100, 49900, 200099, 400198, 800396, 1000495, 2000990, 4001980, 5002475, 10004950, 20009900]

約数ペア:

[(1, 20009900), (2, 10004950), (4, 5002475), (5, 4001980), (10, 2000990), (20, 1000495), (25, 800396), (50, 400198), (100, 200099), (401, 49900), (499, 40100), (802, 24950), (998, 20050), (1604, 12475), (1996, 10025), (2005, 9980), (2495, 8020), (4010, 4990)]