81405128

素因数分解:

$2^3\times 7^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1$

素因数の和:414

約数の個数: 64

約数和(自身を含む): 180195840

約数和(自身を除く): 98790712

約数列:

[1, 2, 4, 7, 8, 14, 28, 47, 56, 94, 157, 188, 197, 314, 329, 376, 394, 628, 658, 788, 1099, 1256, 1316, 1379, 1576, 2198, 2632, 2758, 4396, 5516, 7379, 8792, 9259, 11032, 14758, 18518, 29516, 30929, 37036, 51653, 59032, 61858, 64813, 74072, 103306, 123716, 129626, 206612, 216503, 247432, 259252, 413224, 433006, 518504, 866012, 1453663, 1732024, 2907326, 5814652, 10175641, 11629304, 20351282, 40702564, 81405128]

約数ペア:

[(1, 81405128), (2, 40702564), (4, 20351282), (7, 11629304), (8, 10175641), (14, 5814652), (28, 2907326), (47, 1732024), (56, 1453663), (94, 866012), (157, 518504), (188, 433006), (197, 413224), (314, 259252), (329, 247432), (376, 216503), (394, 206612), (628, 129626), (658, 123716), (788, 103306), (1099, 74072), (1256, 64813), (1316, 61858), (1379, 59032), (1576, 51653), (2198, 37036), (2632, 30929), (2758, 29516), (4396, 18518), (5516, 14758), (7379, 11032), (8792, 9259)]