18931455

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{113}}^1$

素因数の和:217

約数の個数: 64

約数和(自身を含む): 36443520

約数和(自身を除く): 17512065

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 73, 85, 113, 135, 153, 219, 255, 339, 365, 459, 565, 657, 765, 1017, 1095, 1241, 1695, 1921, 1971, 2295, 3051, 3285, 3723, 5085, 5763, 6205, 8249, 9605, 9855, 11169, 15255, 17289, 18615, 24747, 28815, 33507, 41245, 51867, 55845, 74241, 86445, 123735, 140233, 167535, 222723, 259335, 371205, 420699, 701165, 1113615, 1262097, 2103495, 3786291, 6310485, 18931455]

約数ペア:

[(1, 18931455), (3, 6310485), (5, 3786291), (9, 2103495), (15, 1262097), (17, 1113615), (27, 701165), (45, 420699), (51, 371205), (73, 259335), (85, 222723), (113, 167535), (135, 140233), (153, 123735), (219, 86445), (255, 74241), (339, 55845), (365, 51867), (459, 41245), (565, 33507), (657, 28815), (765, 24747), (1017, 18615), (1095, 17289), (1241, 15255), (1695, 11169), (1921, 9855), (1971, 9605), (2295, 8249), (3051, 6205), (3285, 5763), (3723, 5085)]