400900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{211}}^1$

素因数の和:244

約数の個数: 36

約数和(自身を含む): 920080

約数和(自身を除く): 519180

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 190, 211, 380, 422, 475, 844, 950, 1055, 1900, 2110, 4009, 4220, 5275, 8018, 10550, 16036, 20045, 21100, 40090, 80180, 100225, 200450, 400900]

約数ペア:

[(1, 400900), (2, 200450), (4, 100225), (5, 80180), (10, 40090), (19, 21100), (20, 20045), (25, 16036), (38, 10550), (50, 8018), (76, 5275), (95, 4220), (100, 4009), (190, 2110), (211, 1900), (380, 1055), (422, 950), (475, 844)]