81520100

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{607}}^1$

素因数の和:717

約数の個数: 72

約数和(自身を含む): 189987840

約数和(自身を除く): 108467740

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 68, 79, 85, 100, 158, 170, 316, 340, 395, 425, 607, 790, 850, 1214, 1343, 1580, 1700, 1975, 2428, 2686, 3035, 3950, 5372, 6070, 6715, 7900, 10319, 12140, 13430, 15175, 20638, 26860, 30350, 33575, 41276, 47953, 51595, 60700, 67150, 95906, 103190, 134300, 191812, 206380, 239765, 257975, 479530, 515950, 815201, 959060, 1031900, 1198825, 1630402, 2397650, 3260804, 4076005, 4795300, 8152010, 16304020, 20380025, 40760050, 81520100]

約数ペア:

[(1, 81520100), (2, 40760050), (4, 20380025), (5, 16304020), (10, 8152010), (17, 4795300), (20, 4076005), (25, 3260804), (34, 2397650), (50, 1630402), (68, 1198825), (79, 1031900), (85, 959060), (100, 815201), (158, 515950), (170, 479530), (316, 257975), (340, 239765), (395, 206380), (425, 191812), (607, 134300), (790, 103190), (850, 95906), (1214, 67150), (1343, 60700), (1580, 51595), (1700, 47953), (1975, 41276), (2428, 33575), (2686, 30350), (3035, 26860), (3950, 20638), (5372, 15175), (6070, 13430), (6715, 12140), (7900, 10319)]