19189880

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{233}}^1$

素因数の和:344

約数の個数: 64

約数和(自身を含む): 45489600

約数和(自身を除く): 26299720

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 71, 116, 142, 145, 232, 233, 284, 290, 355, 466, 568, 580, 710, 932, 1160, 1165, 1420, 1864, 2059, 2330, 2840, 4118, 4660, 6757, 8236, 9320, 10295, 13514, 16472, 16543, 20590, 27028, 33086, 33785, 41180, 54056, 66172, 67570, 82360, 82715, 132344, 135140, 165430, 270280, 330860, 479747, 661720, 959494, 1918988, 2398735, 3837976, 4797470, 9594940, 19189880]

約数ペア:

[(1, 19189880), (2, 9594940), (4, 4797470), (5, 3837976), (8, 2398735), (10, 1918988), (20, 959494), (29, 661720), (40, 479747), (58, 330860), (71, 270280), (116, 165430), (142, 135140), (145, 132344), (232, 82715), (233, 82360), (284, 67570), (290, 66172), (355, 54056), (466, 41180), (568, 33785), (580, 33086), (710, 27028), (932, 20590), (1160, 16543), (1165, 16472), (1420, 13514), (1864, 10295), (2059, 9320), (2330, 8236), (2840, 6757), (4118, 4660)]