20561640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{421}}^1$

素因数の和:483

約数の個数: 128

約数和(自身を含む): 69275520

約数和(自身を除く): 48713880

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 37, 40, 44, 55, 60, 66, 74, 88, 110, 111, 120, 132, 148, 165, 185, 220, 222, 264, 296, 330, 370, 407, 421, 440, 444, 555, 660, 740, 814, 842, 888, 1110, 1221, 1263, 1320, 1480, 1628, 1684, 2035, 2105, 2220, 2442, 2526, 3256, 3368, 4070, 4210, 4440, 4631, 4884, 5052, 6105, 6315, 8140, 8420, 9262, 9768, 10104, 12210, 12630, 13893, 15577, 16280, 16840, 18524, 23155, 24420, 25260, 27786, 31154, 37048, 46310, 46731, 48840, 50520, 55572, 62308, 69465, 77885, 92620, 93462, 111144, 124616, 138930, 155770, 171347, 185240, 186924, 233655, 277860, 311540, 342694, 373848, 467310, 514041, 555720, 623080, 685388, 856735, 934620, 1028082, 1370776, 1713470, 1869240, 2056164, 2570205, 3426940, 4112328, 5140410, 6853880, 10280820, 20561640]

約数ペア:

[(1, 20561640), (2, 10280820), (3, 6853880), (4, 5140410), (5, 4112328), (6, 3426940), (8, 2570205), (10, 2056164), (11, 1869240), (12, 1713470), (15, 1370776), (20, 1028082), (22, 934620), (24, 856735), (30, 685388), (33, 623080), (37, 555720), (40, 514041), (44, 467310), (55, 373848), (60, 342694), (66, 311540), (74, 277860), (88, 233655), (110, 186924), (111, 185240), (120, 171347), (132, 155770), (148, 138930), (165, 124616), (185, 111144), (220, 93462), (222, 92620), (264, 77885), (296, 69465), (330, 62308), (370, 55572), (407, 50520), (421, 48840), (440, 46731), (444, 46310), (555, 37048), (660, 31154), (740, 27786), (814, 25260), (842, 24420), (888, 23155), (1110, 18524), (1221, 16840), (1263, 16280), (1320, 15577), (1480, 13893), (1628, 12630), (1684, 12210), (2035, 10104), (2105, 9768), (2220, 9262), (2442, 8420), (2526, 8140), (3256, 6315), (3368, 6105), (4070, 5052), (4210, 4884), (4440, 4631)]