398417840

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{4297}}^1$

素因数の和:4390

約数の個数: 80

約数和(自身を含む): 991290720

約数和(自身を除く): 592872880

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 61, 76, 80, 95, 122, 152, 190, 244, 304, 305, 380, 488, 610, 760, 976, 1159, 1220, 1520, 2318, 2440, 4297, 4636, 4880, 5795, 8594, 9272, 11590, 17188, 18544, 21485, 23180, 34376, 42970, 46360, 68752, 81643, 85940, 92720, 163286, 171880, 262117, 326572, 343760, 408215, 524234, 653144, 816430, 1048468, 1306288, 1310585, 1632860, 2096936, 2621170, 3265720, 4193872, 4980223, 5242340, 6531440, 9960446, 10484680, 19920892, 20969360, 24901115, 39841784, 49802230, 79683568, 99604460, 199208920, 398417840]

約数ペア:

[(1, 398417840), (2, 199208920), (4, 99604460), (5, 79683568), (8, 49802230), (10, 39841784), (16, 24901115), (19, 20969360), (20, 19920892), (38, 10484680), (40, 9960446), (61, 6531440), (76, 5242340), (80, 4980223), (95, 4193872), (122, 3265720), (152, 2621170), (190, 2096936), (244, 1632860), (304, 1310585), (305, 1306288), (380, 1048468), (488, 816430), (610, 653144), (760, 524234), (976, 408215), (1159, 343760), (1220, 326572), (1520, 262117), (2318, 171880), (2440, 163286), (4297, 92720), (4636, 85940), (4880, 81643), (5795, 68752), (8594, 46360), (9272, 42970), (11590, 34376), (17188, 23180), (18544, 21485)]