20772980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{571}}^1$

素因数の和:704

約数の個数: 48

約数和(自身を含む): 46702656

約数和(自身を除く): 25929676

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 107, 170, 214, 340, 428, 535, 571, 1070, 1142, 1819, 2140, 2284, 2855, 3638, 5710, 7276, 9095, 9707, 11420, 18190, 19414, 36380, 38828, 48535, 61097, 97070, 122194, 194140, 244388, 305485, 610970, 1038649, 1221940, 2077298, 4154596, 5193245, 10386490, 20772980]

約数ペア:

[(1, 20772980), (2, 10386490), (4, 5193245), (5, 4154596), (10, 2077298), (17, 1221940), (20, 1038649), (34, 610970), (68, 305485), (85, 244388), (107, 194140), (170, 122194), (214, 97070), (340, 61097), (428, 48535), (535, 38828), (571, 36380), (1070, 19414), (1142, 18190), (1819, 11420), (2140, 9707), (2284, 9095), (2855, 7276), (3638, 5710)]