18948125

素因数分解:

$5^4\times 7^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:159

約数の個数: 40

約数和(自身を含む): 27891072

約数和(自身を除く): 8942947

約数列:

[1, 5, 7, 25, 35, 61, 71, 125, 175, 305, 355, 427, 497, 625, 875, 1525, 1775, 2135, 2485, 4331, 4375, 7625, 8875, 10675, 12425, 21655, 30317, 38125, 44375, 53375, 62125, 108275, 151585, 266875, 310625, 541375, 757925, 2706875, 3789625, 18948125]

約数ペア:

[(1, 18948125), (5, 3789625), (7, 2706875), (25, 757925), (35, 541375), (61, 310625), (71, 266875), (125, 151585), (175, 108275), (305, 62125), (355, 53375), (427, 44375), (497, 38125), (625, 30317), (875, 21655), (1525, 12425), (1775, 10675), (2135, 8875), (2485, 7625), (4331, 4375)]