19749940

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{2879}}^1$

素因数の和:2909

約数の個数: 48

約数和(自身を含む): 48384000

約数和(自身を除く): 28634060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 490, 686, 980, 1372, 1715, 2879, 3430, 5758, 6860, 11516, 14395, 20153, 28790, 40306, 57580, 80612, 100765, 141071, 201530, 282142, 403060, 564284, 705355, 987497, 1410710, 1974994, 2821420, 3949988, 4937485, 9874970, 19749940]

約数ペア:

[(1, 19749940), (2, 9874970), (4, 4937485), (5, 3949988), (7, 2821420), (10, 1974994), (14, 1410710), (20, 987497), (28, 705355), (35, 564284), (49, 403060), (70, 282142), (98, 201530), (140, 141071), (196, 100765), (245, 80612), (343, 57580), (490, 40306), (686, 28790), (980, 20153), (1372, 14395), (1715, 11516), (2879, 6860), (3430, 5758)]