81781175

素因数分解:

$5^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{163}}^1$

素因数の和:288

約数の個数: 48

約数和(自身を含む): 121039872

約数和(自身を除く): 39258697

約数列:

[1, 5, 7, 25, 35, 47, 61, 163, 175, 235, 305, 329, 427, 815, 1141, 1175, 1525, 1645, 2135, 2867, 4075, 5705, 7661, 8225, 9943, 10675, 14335, 20069, 28525, 38305, 49715, 53627, 69601, 71675, 100345, 191525, 248575, 268135, 348005, 467321, 501725, 1340675, 1740025, 2336605, 3271247, 11683025, 16356235, 81781175]

約数ペア:

[(1, 81781175), (5, 16356235), (7, 11683025), (25, 3271247), (35, 2336605), (47, 1740025), (61, 1340675), (163, 501725), (175, 467321), (235, 348005), (305, 268135), (329, 248575), (427, 191525), (815, 100345), (1141, 71675), (1175, 69601), (1525, 53627), (1645, 49715), (2135, 38305), (2867, 28525), (4075, 20069), (5705, 14335), (7661, 10675), (8225, 9943)]