80765680

素因数分解:

$2^4\times 5^1\times {\mathrm{397}}^1\times {\mathrm{2543}}^1$

素因数の和:2953

約数の個数: 40

約数和(自身を含む): 188327232

約数和(自身を除く): 107561552

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 397, 794, 1588, 1985, 2543, 3176, 3970, 5086, 6352, 7940, 10172, 12715, 15880, 20344, 25430, 31760, 40688, 50860, 101720, 203440, 1009571, 2019142, 4038284, 5047855, 8076568, 10095710, 16153136, 20191420, 40382840, 80765680]

約数ペア:

[(1, 80765680), (2, 40382840), (4, 20191420), (5, 16153136), (8, 10095710), (10, 8076568), (16, 5047855), (20, 4038284), (40, 2019142), (80, 1009571), (397, 203440), (794, 101720), (1588, 50860), (1985, 40688), (2543, 31760), (3176, 25430), (3970, 20344), (5086, 15880), (6352, 12715), (7940, 10172)]