20731480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1$

素因数の和:209

約数の個数: 128

約数和(自身を含む): 59719680

約数和(自身を除く): 38988200

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 53, 55, 56, 70, 77, 88, 106, 110, 127, 140, 154, 212, 220, 254, 265, 280, 308, 371, 385, 424, 440, 508, 530, 583, 616, 635, 742, 770, 889, 1016, 1060, 1166, 1270, 1397, 1484, 1540, 1778, 1855, 2120, 2332, 2540, 2794, 2915, 2968, 3080, 3556, 3710, 4081, 4445, 4664, 5080, 5588, 5830, 6731, 6985, 7112, 7420, 8162, 8890, 9779, 11176, 11660, 13462, 13970, 14840, 16324, 17780, 19558, 20405, 23320, 26924, 27940, 32648, 33655, 35560, 39116, 40810, 47117, 48895, 53848, 55880, 67310, 74041, 78232, 81620, 94234, 97790, 134620, 148082, 163240, 188468, 195580, 235585, 269240, 296164, 370205, 376936, 391160, 471170, 518287, 592328, 740410, 942340, 1036574, 1480820, 1884680, 2073148, 2591435, 2961640, 4146296, 5182870, 10365740, 20731480]

約数ペア:

[(1, 20731480), (2, 10365740), (4, 5182870), (5, 4146296), (7, 2961640), (8, 2591435), (10, 2073148), (11, 1884680), (14, 1480820), (20, 1036574), (22, 942340), (28, 740410), (35, 592328), (40, 518287), (44, 471170), (53, 391160), (55, 376936), (56, 370205), (70, 296164), (77, 269240), (88, 235585), (106, 195580), (110, 188468), (127, 163240), (140, 148082), (154, 134620), (212, 97790), (220, 94234), (254, 81620), (265, 78232), (280, 74041), (308, 67310), (371, 55880), (385, 53848), (424, 48895), (440, 47117), (508, 40810), (530, 39116), (583, 35560), (616, 33655), (635, 32648), (742, 27940), (770, 26924), (889, 23320), (1016, 20405), (1060, 19558), (1166, 17780), (1270, 16324), (1397, 14840), (1484, 13970), (1540, 13462), (1778, 11660), (1855, 11176), (2120, 9779), (2332, 8890), (2540, 8162), (2794, 7420), (2915, 7112), (2968, 6985), (3080, 6731), (3556, 5830), (3710, 5588), (4081, 5080), (4445, 4664)]