18996811280

素因数分解:

$2^4\times 5^1\times {\mathrm{9931}}^1\times {\mathrm{23911}}^1$

素因数の和:33855

約数の個数: 40

約数和(自身を含む): 44173881024

約数和(自身を除く): 25177069744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 9931, 19862, 23911, 39724, 47822, 49655, 79448, 95644, 99310, 119555, 158896, 191288, 198620, 239110, 382576, 397240, 478220, 794480, 956440, 1912880, 237460141, 474920282, 949840564, 1187300705, 1899681128, 2374601410, 3799362256, 4749202820, 9498405640, 18996811280]

約数ペア:

[(1, 18996811280), (2, 9498405640), (4, 4749202820), (5, 3799362256), (8, 2374601410), (10, 1899681128), (16, 1187300705), (20, 949840564), (40, 474920282), (80, 237460141), (9931, 1912880), (19862, 956440), (23911, 794480), (39724, 478220), (47822, 397240), (49655, 382576), (79448, 239110), (95644, 198620), (99310, 191288), (119555, 158896)]