19847960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{571}}^1$

素因数の和:672

約数の個数: 64

約数和(自身を含む): 49420800

約数和(自身を除く): 29572840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 79, 88, 110, 158, 220, 316, 395, 440, 571, 632, 790, 869, 1142, 1580, 1738, 2284, 2855, 3160, 3476, 4345, 4568, 5710, 6281, 6952, 8690, 11420, 12562, 17380, 22840, 25124, 31405, 34760, 45109, 50248, 62810, 90218, 125620, 180436, 225545, 251240, 360872, 451090, 496199, 902180, 992398, 1804360, 1984796, 2480995, 3969592, 4961990, 9923980, 19847960]

約数ペア:

[(1, 19847960), (2, 9923980), (4, 4961990), (5, 3969592), (8, 2480995), (10, 1984796), (11, 1804360), (20, 992398), (22, 902180), (40, 496199), (44, 451090), (55, 360872), (79, 251240), (88, 225545), (110, 180436), (158, 125620), (220, 90218), (316, 62810), (395, 50248), (440, 45109), (571, 34760), (632, 31405), (790, 25124), (869, 22840), (1142, 17380), (1580, 12562), (1738, 11420), (2284, 8690), (2855, 6952), (3160, 6281), (3476, 5710), (4345, 4568)]