81019895

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1$

素因数の和:168

約数の個数: 64

約数和(自身を含む): 119992320

約数和(自身を除く): 38972425

約数列:

[1, 5, 11, 19, 31, 41, 55, 61, 95, 155, 205, 209, 305, 341, 451, 589, 671, 779, 1045, 1159, 1271, 1705, 1891, 2255, 2501, 2945, 3355, 3895, 5795, 6355, 6479, 8569, 9455, 12505, 12749, 13981, 20801, 24149, 27511, 32395, 35929, 42845, 47519, 63745, 69905, 77531, 104005, 120745, 137555, 179645, 237595, 265639, 387655, 395219, 522709, 852841, 1328195, 1473089, 1976095, 2613545, 4264205, 7365445, 16203979, 81019895]

約数ペア:

[(1, 81019895), (5, 16203979), (11, 7365445), (19, 4264205), (31, 2613545), (41, 1976095), (55, 1473089), (61, 1328195), (95, 852841), (155, 522709), (205, 395219), (209, 387655), (305, 265639), (341, 237595), (451, 179645), (589, 137555), (671, 120745), (779, 104005), (1045, 77531), (1159, 69905), (1271, 63745), (1705, 47519), (1891, 42845), (2255, 35929), (2501, 32395), (2945, 27511), (3355, 24149), (3895, 20801), (5795, 13981), (6355, 12749), (6479, 12505), (8569, 9455)]