66537640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{643}}^1$

素因数の和:866

約数の個数: 64

約数和(自身を含む): 162288000

約数和(自身を除く): 95750360

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 199, 260, 398, 520, 643, 796, 995, 1286, 1592, 1990, 2572, 2587, 3215, 3980, 5144, 5174, 6430, 7960, 8359, 10348, 12860, 12935, 16718, 20696, 25720, 25870, 33436, 41795, 51740, 66872, 83590, 103480, 127957, 167180, 255914, 334360, 511828, 639785, 1023656, 1279570, 1663441, 2559140, 3326882, 5118280, 6653764, 8317205, 13307528, 16634410, 33268820, 66537640]

約数ペア:

[(1, 66537640), (2, 33268820), (4, 16634410), (5, 13307528), (8, 8317205), (10, 6653764), (13, 5118280), (20, 3326882), (26, 2559140), (40, 1663441), (52, 1279570), (65, 1023656), (104, 639785), (130, 511828), (199, 334360), (260, 255914), (398, 167180), (520, 127957), (643, 103480), (796, 83590), (995, 66872), (1286, 51740), (1592, 41795), (1990, 33436), (2572, 25870), (2587, 25720), (3215, 20696), (3980, 16718), (5144, 12935), (5174, 12860), (6430, 10348), (7960, 8359)]