18078020

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{439}}^1$

素因数の和:548

約数の個数: 48

約数和(自身を含む): 39916800

約数和(自身を除く): 21838780

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 71, 116, 142, 145, 284, 290, 355, 439, 580, 710, 878, 1420, 1756, 2059, 2195, 4118, 4390, 8236, 8780, 10295, 12731, 20590, 25462, 31169, 41180, 50924, 62338, 63655, 124676, 127310, 155845, 254620, 311690, 623380, 903901, 1807802, 3615604, 4519505, 9039010, 18078020]

約数ペア:

[(1, 18078020), (2, 9039010), (4, 4519505), (5, 3615604), (10, 1807802), (20, 903901), (29, 623380), (58, 311690), (71, 254620), (116, 155845), (142, 127310), (145, 124676), (284, 63655), (290, 62338), (355, 50924), (439, 41180), (580, 31169), (710, 25462), (878, 20590), (1420, 12731), (1756, 10295), (2059, 8780), (2195, 8236), (4118, 4390)]