81012760

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{8069}}^1$

素因数の和:8331

約数の個数: 32

約数和(自身を含む): 183027600

約数和(自身を除く): 102014840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 2008, 2510, 5020, 8069, 10040, 16138, 32276, 40345, 64552, 80690, 161380, 322760, 2025319, 4050638, 8101276, 10126595, 16202552, 20253190, 40506380, 81012760]

約数ペア:

[(1, 81012760), (2, 40506380), (4, 20253190), (5, 16202552), (8, 10126595), (10, 8101276), (20, 4050638), (40, 2025319), (251, 322760), (502, 161380), (1004, 80690), (1255, 64552), (2008, 40345), (2510, 32276), (5020, 16138), (8069, 10040)]