19171917

素因数分解:

$3^3\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:290

約数の個数: 32

約数和(自身を含む): 29410560

約数和(自身を除く): 10238643

約数列:

[1, 3, 9, 27, 71, 73, 137, 213, 219, 411, 639, 657, 1233, 1917, 1971, 3699, 5183, 9727, 10001, 15549, 29181, 30003, 46647, 87543, 90009, 139941, 262629, 270027, 710071, 2130213, 6390639, 19171917]

約数ペア:

[(1, 19171917), (3, 6390639), (9, 2130213), (27, 710071), (71, 270027), (73, 262629), (137, 139941), (213, 90009), (219, 87543), (411, 46647), (639, 30003), (657, 29181), (1233, 15549), (1917, 10001), (1971, 9727), (3699, 5183)]