61981815

素因数分解:

$3^1\times 5^1\times 7^4\times {\mathrm{1721}}^1$

素因数の和:1757

約数の個数: 40

約数和(自身を含む): 115759728

約数和(自身を除く): 53777913

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 343, 735, 1029, 1715, 1721, 2401, 5145, 5163, 7203, 8605, 12005, 12047, 25815, 36015, 36141, 60235, 84329, 180705, 252987, 421645, 590303, 1264935, 1770909, 2951515, 4132121, 8854545, 12396363, 20660605, 61981815]

約数ペア:

[(1, 61981815), (3, 20660605), (5, 12396363), (7, 8854545), (15, 4132121), (21, 2951515), (35, 1770909), (49, 1264935), (105, 590303), (147, 421645), (245, 252987), (343, 180705), (735, 84329), (1029, 60235), (1715, 36141), (1721, 36015), (2401, 25815), (5145, 12047), (5163, 12005), (7203, 8605)]