16681960

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{197}}^1$

素因数の和:310

約数の個数: 64

約数和(自身を含む): 39560400

約数和(自身を除く): 22878440

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 73, 116, 145, 146, 197, 232, 290, 292, 365, 394, 580, 584, 730, 788, 985, 1160, 1460, 1576, 1970, 2117, 2920, 3940, 4234, 5713, 7880, 8468, 10585, 11426, 14381, 16936, 21170, 22852, 28565, 28762, 42340, 45704, 57130, 57524, 71905, 84680, 114260, 115048, 143810, 228520, 287620, 417049, 575240, 834098, 1668196, 2085245, 3336392, 4170490, 8340980, 16681960]

約数ペア:

[(1, 16681960), (2, 8340980), (4, 4170490), (5, 3336392), (8, 2085245), (10, 1668196), (20, 834098), (29, 575240), (40, 417049), (58, 287620), (73, 228520), (116, 143810), (145, 115048), (146, 114260), (197, 84680), (232, 71905), (290, 57524), (292, 57130), (365, 45704), (394, 42340), (580, 28762), (584, 28565), (730, 22852), (788, 21170), (985, 16936), (1160, 14381), (1460, 11426), (1576, 10585), (1970, 8468), (2117, 7880), (2920, 5713), (3940, 4234)]