81513800

素因数分解:

$2^3\times 5^2\times {\mathrm{19}}^2\times {\mathrm{1129}}^1$

素因数の和:1183

約数の個数: 72

約数和(自身を含む): 200196450

約数和(自身を除く): 118682650

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 95, 100, 152, 190, 200, 361, 380, 475, 722, 760, 950, 1129, 1444, 1805, 1900, 2258, 2888, 3610, 3800, 4516, 5645, 7220, 9025, 9032, 11290, 14440, 18050, 21451, 22580, 28225, 36100, 42902, 45160, 56450, 72200, 85804, 107255, 112900, 171608, 214510, 225800, 407569, 429020, 536275, 815138, 858040, 1072550, 1630276, 2037845, 2145100, 3260552, 4075690, 4290200, 8151380, 10189225, 16302760, 20378450, 40756900, 81513800]

約数ペア:

[(1, 81513800), (2, 40756900), (4, 20378450), (5, 16302760), (8, 10189225), (10, 8151380), (19, 4290200), (20, 4075690), (25, 3260552), (38, 2145100), (40, 2037845), (50, 1630276), (76, 1072550), (95, 858040), (100, 815138), (152, 536275), (190, 429020), (200, 407569), (361, 225800), (380, 214510), (475, 171608), (722, 112900), (760, 107255), (950, 85804), (1129, 72200), (1444, 56450), (1805, 45160), (1900, 42902), (2258, 36100), (2888, 28225), (3610, 22580), (3800, 21451), (4516, 18050), (5645, 14440), (7220, 11290), (9025, 9032)]