78734740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{89}}^2$

素因数の和:265

約数の個数: 72

約数和(自身を含む): 193802112

約数和(自身を除く): 115067372

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 89, 140, 142, 178, 284, 355, 356, 445, 497, 623, 710, 890, 994, 1246, 1420, 1780, 1988, 2485, 2492, 3115, 4970, 6230, 6319, 7921, 9940, 12460, 12638, 15842, 25276, 31595, 31684, 39605, 44233, 55447, 63190, 79210, 88466, 110894, 126380, 158420, 176932, 221165, 221788, 277235, 442330, 554470, 562391, 884660, 1108940, 1124782, 2249564, 2811955, 3936737, 5623910, 7873474, 11247820, 15746948, 19683685, 39367370, 78734740]

約数ペア:

[(1, 78734740), (2, 39367370), (4, 19683685), (5, 15746948), (7, 11247820), (10, 7873474), (14, 5623910), (20, 3936737), (28, 2811955), (35, 2249564), (70, 1124782), (71, 1108940), (89, 884660), (140, 562391), (142, 554470), (178, 442330), (284, 277235), (355, 221788), (356, 221165), (445, 176932), (497, 158420), (623, 126380), (710, 110894), (890, 88466), (994, 79210), (1246, 63190), (1420, 55447), (1780, 44233), (1988, 39605), (2485, 31684), (2492, 31595), (3115, 25276), (4970, 15842), (6230, 12638), (6319, 12460), (7921, 9940)]