19981815

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{4049}}^1$

素因数の和:4111

約数の個数: 32

約数和(自身を含む): 37324800

約数和(自身を除く): 17342985

約数列:

[1, 3, 5, 7, 15, 21, 35, 47, 105, 141, 235, 329, 705, 987, 1645, 4049, 4935, 12147, 20245, 28343, 60735, 85029, 141715, 190303, 425145, 570909, 951515, 1332121, 2854545, 3996363, 6660605, 19981815]

約数ペア:

[(1, 19981815), (3, 6660605), (5, 3996363), (7, 2854545), (15, 1332121), (21, 951515), (35, 570909), (47, 425145), (105, 190303), (141, 141715), (235, 85029), (329, 60735), (705, 28343), (987, 20245), (1645, 12147), (4049, 4935)]