19836400

素因数分解:

$2^4\times 5^2\times {\mathrm{101}}^1\times {\mathrm{491}}^1$

素因数の和:610

約数の個数: 60

約数和(自身を含む): 48226824

約数和(自身を除く): 28390424

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 101, 200, 202, 400, 404, 491, 505, 808, 982, 1010, 1616, 1964, 2020, 2455, 2525, 3928, 4040, 4910, 5050, 7856, 8080, 9820, 10100, 12275, 19640, 20200, 24550, 39280, 40400, 49100, 49591, 98200, 99182, 196400, 198364, 247955, 396728, 495910, 793456, 991820, 1239775, 1983640, 2479550, 3967280, 4959100, 9918200, 19836400]

約数ペア:

[(1, 19836400), (2, 9918200), (4, 4959100), (5, 3967280), (8, 2479550), (10, 1983640), (16, 1239775), (20, 991820), (25, 793456), (40, 495910), (50, 396728), (80, 247955), (100, 198364), (101, 196400), (200, 99182), (202, 98200), (400, 49591), (404, 49100), (491, 40400), (505, 39280), (808, 24550), (982, 20200), (1010, 19640), (1616, 12275), (1964, 10100), (2020, 9820), (2455, 8080), (2525, 7856), (3928, 5050), (4040, 4910)]