81513320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{3271}}^1$

素因数の和:3378

約数の個数: 64

約数和(自身を含む): 212025600

約数和(自身を除く): 130512280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 89, 140, 178, 280, 356, 445, 623, 712, 890, 1246, 1780, 2492, 3115, 3271, 3560, 4984, 6230, 6542, 12460, 13084, 16355, 22897, 24920, 26168, 32710, 45794, 65420, 91588, 114485, 130840, 183176, 228970, 291119, 457940, 582238, 915880, 1164476, 1455595, 2037833, 2328952, 2911190, 4075666, 5822380, 8151332, 10189165, 11644760, 16302664, 20378330, 40756660, 81513320]

約数ペア:

[(1, 81513320), (2, 40756660), (4, 20378330), (5, 16302664), (7, 11644760), (8, 10189165), (10, 8151332), (14, 5822380), (20, 4075666), (28, 2911190), (35, 2328952), (40, 2037833), (56, 1455595), (70, 1164476), (89, 915880), (140, 582238), (178, 457940), (280, 291119), (356, 228970), (445, 183176), (623, 130840), (712, 114485), (890, 91588), (1246, 65420), (1780, 45794), (2492, 32710), (3115, 26168), (3271, 24920), (3560, 22897), (4984, 16355), (6230, 13084), (6542, 12460)]