20005040

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{179}}^1$

素因数の和:330

約数の個数: 80

約数和(自身を含む): 51425280

約数和(自身を除く): 31420240

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 127, 176, 179, 220, 254, 358, 440, 508, 635, 716, 880, 895, 1016, 1270, 1397, 1432, 1790, 1969, 2032, 2540, 2794, 2864, 3580, 3938, 5080, 5588, 6985, 7160, 7876, 9845, 10160, 11176, 13970, 14320, 15752, 19690, 22352, 22733, 27940, 31504, 39380, 45466, 55880, 78760, 90932, 111760, 113665, 157520, 181864, 227330, 250063, 363728, 454660, 500126, 909320, 1000252, 1250315, 1818640, 2000504, 2500630, 4001008, 5001260, 10002520, 20005040]

約数ペア:

[(1, 20005040), (2, 10002520), (4, 5001260), (5, 4001008), (8, 2500630), (10, 2000504), (11, 1818640), (16, 1250315), (20, 1000252), (22, 909320), (40, 500126), (44, 454660), (55, 363728), (80, 250063), (88, 227330), (110, 181864), (127, 157520), (176, 113665), (179, 111760), (220, 90932), (254, 78760), (358, 55880), (440, 45466), (508, 39380), (635, 31504), (716, 27940), (880, 22733), (895, 22352), (1016, 19690), (1270, 15752), (1397, 14320), (1432, 13970), (1790, 11176), (1969, 10160), (2032, 9845), (2540, 7876), (2794, 7160), (2864, 6985), (3580, 5588), (3938, 5080)]