40019800

素因数分解:

$2^3\times 5^2\times {\mathrm{401}}^1\times {\mathrm{499}}^1$

素因数の和:916

約数の個数: 48

約数和(自身を含む): 93465000

約数和(自身を除く): 53445200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 401, 499, 802, 998, 1604, 1996, 2005, 2495, 3208, 3992, 4010, 4990, 8020, 9980, 10025, 12475, 16040, 19960, 20050, 24950, 40100, 49900, 80200, 99800, 200099, 400198, 800396, 1000495, 1600792, 2000990, 4001980, 5002475, 8003960, 10004950, 20009900, 40019800]

約数ペア:

[(1, 40019800), (2, 20009900), (4, 10004950), (5, 8003960), (8, 5002475), (10, 4001980), (20, 2000990), (25, 1600792), (40, 1000495), (50, 800396), (100, 400198), (200, 200099), (401, 99800), (499, 80200), (802, 49900), (998, 40100), (1604, 24950), (1996, 20050), (2005, 19960), (2495, 16040), (3208, 12475), (3992, 10025), (4010, 9980), (4990, 8020)]