19609975

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{167}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 30998016

約数和(自身を除く): 11388041

約数列:

[1, 5, 7, 11, 25, 35, 55, 61, 77, 167, 175, 275, 305, 385, 427, 671, 835, 1169, 1525, 1837, 1925, 2135, 3355, 4175, 4697, 5845, 9185, 10187, 10675, 12859, 16775, 23485, 29225, 45925, 50935, 64295, 71309, 112057, 117425, 254675, 321475, 356545, 560285, 784399, 1782725, 2801425, 3921995, 19609975]

約数ペア:

[(1, 19609975), (5, 3921995), (7, 2801425), (11, 1782725), (25, 784399), (35, 560285), (55, 356545), (61, 321475), (77, 254675), (167, 117425), (175, 112057), (275, 71309), (305, 64295), (385, 50935), (427, 45925), (671, 29225), (835, 23485), (1169, 16775), (1525, 12859), (1837, 10675), (1925, 10187), (2135, 9185), (3355, 5845), (4175, 4697)]