20542760

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{223}}^1$

素因数の和:295

約数の個数: 96

約数和(自身を含む): 55157760

約数和(自身を除く): 34615000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 47, 49, 56, 70, 94, 98, 140, 188, 196, 223, 235, 245, 280, 329, 376, 392, 446, 470, 490, 658, 892, 940, 980, 1115, 1316, 1561, 1645, 1784, 1880, 1960, 2230, 2303, 2632, 3122, 3290, 4460, 4606, 6244, 6580, 7805, 8920, 9212, 10481, 10927, 11515, 12488, 13160, 15610, 18424, 20962, 21854, 23030, 31220, 41924, 43708, 46060, 52405, 54635, 62440, 73367, 83848, 87416, 92120, 104810, 109270, 146734, 209620, 218540, 293468, 366835, 419240, 437080, 513569, 586936, 733670, 1027138, 1467340, 2054276, 2567845, 2934680, 4108552, 5135690, 10271380, 20542760]

約数ペア:

[(1, 20542760), (2, 10271380), (4, 5135690), (5, 4108552), (7, 2934680), (8, 2567845), (10, 2054276), (14, 1467340), (20, 1027138), (28, 733670), (35, 586936), (40, 513569), (47, 437080), (49, 419240), (56, 366835), (70, 293468), (94, 218540), (98, 209620), (140, 146734), (188, 109270), (196, 104810), (223, 92120), (235, 87416), (245, 83848), (280, 73367), (329, 62440), (376, 54635), (392, 52405), (446, 46060), (470, 43708), (490, 41924), (658, 31220), (892, 23030), (940, 21854), (980, 20962), (1115, 18424), (1316, 15610), (1561, 13160), (1645, 12488), (1784, 11515), (1880, 10927), (1960, 10481), (2230, 9212), (2303, 8920), (2632, 7805), (3122, 6580), (3290, 6244), (4460, 4606)]