18340520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{571}}^1$

素因数の和:666

約数の個数: 64

約数和(自身を含む): 45714240

約数和(自身を除く): 27373720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 73, 88, 110, 146, 220, 292, 365, 440, 571, 584, 730, 803, 1142, 1460, 1606, 2284, 2855, 2920, 3212, 4015, 4568, 5710, 6281, 6424, 8030, 11420, 12562, 16060, 22840, 25124, 31405, 32120, 41683, 50248, 62810, 83366, 125620, 166732, 208415, 251240, 333464, 416830, 458513, 833660, 917026, 1667320, 1834052, 2292565, 3668104, 4585130, 9170260, 18340520]

約数ペア:

[(1, 18340520), (2, 9170260), (4, 4585130), (5, 3668104), (8, 2292565), (10, 1834052), (11, 1667320), (20, 917026), (22, 833660), (40, 458513), (44, 416830), (55, 333464), (73, 251240), (88, 208415), (110, 166732), (146, 125620), (220, 83366), (292, 62810), (365, 50248), (440, 41683), (571, 32120), (584, 31405), (730, 25124), (803, 22840), (1142, 16060), (1460, 12562), (1606, 11420), (2284, 8030), (2855, 6424), (2920, 6281), (3212, 5710), (4015, 4568)]