81010000

素因数分解:

$2^4\times 5^4\times {\mathrm{8101}}^1$

素因数の和:8129

約数の個数: 50

約数和(自身を含む): 196157522

約数和(自身を除く): 115147522

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2500, 5000, 8101, 10000, 16202, 32404, 40505, 64808, 81010, 129616, 162020, 202525, 324040, 405050, 648080, 810100, 1012625, 1620200, 2025250, 3240400, 4050500, 5063125, 8101000, 10126250, 16202000, 20252500, 40505000, 81010000]

約数ペア:

[(1, 81010000), (2, 40505000), (4, 20252500), (5, 16202000), (8, 10126250), (10, 8101000), (16, 5063125), (20, 4050500), (25, 3240400), (40, 2025250), (50, 1620200), (80, 1012625), (100, 810100), (125, 648080), (200, 405050), (250, 324040), (400, 202525), (500, 162020), (625, 129616), (1000, 81010), (1250, 64808), (2000, 40505), (2500, 32404), (5000, 16202), (8101, 10000)]