19678840

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{4871}}^1$

素因数の和:4983

約数の個数: 32

約数和(自身を含む): 44724960

約数和(自身を除く): 25046120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 4871, 9742, 19484, 24355, 38968, 48710, 97420, 194840, 491971, 983942, 1967884, 2459855, 3935768, 4919710, 9839420, 19678840]

約数ペア:

[(1, 19678840), (2, 9839420), (4, 4919710), (5, 3935768), (8, 2459855), (10, 1967884), (20, 983942), (40, 491971), (101, 194840), (202, 97420), (404, 48710), (505, 38968), (808, 24355), (1010, 19484), (2020, 9742), (4040, 4871)]