20897864

素因数分解:

$2^3\times {\mathrm{13}}^3\times {\mathrm{29}}^1\times {\mathrm{41}}^1$

素因数の和:115

約数の個数: 64

約数和(自身を含む): 44982000

約数和(自身を除く): 24084136

約数列:

[1, 2, 4, 8, 13, 26, 29, 41, 52, 58, 82, 104, 116, 164, 169, 232, 328, 338, 377, 533, 676, 754, 1066, 1189, 1352, 1508, 2132, 2197, 2378, 3016, 4264, 4394, 4756, 4901, 6929, 8788, 9512, 9802, 13858, 15457, 17576, 19604, 27716, 30914, 39208, 55432, 61828, 63713, 90077, 123656, 127426, 180154, 200941, 254852, 360308, 401882, 509704, 720616, 803764, 1607528, 2612233, 5224466, 10448932, 20897864]

約数ペア:

[(1, 20897864), (2, 10448932), (4, 5224466), (8, 2612233), (13, 1607528), (26, 803764), (29, 720616), (41, 509704), (52, 401882), (58, 360308), (82, 254852), (104, 200941), (116, 180154), (164, 127426), (169, 123656), (232, 90077), (328, 63713), (338, 61828), (377, 55432), (533, 39208), (676, 30914), (754, 27716), (1066, 19604), (1189, 17576), (1352, 15457), (1508, 13858), (2132, 9802), (2197, 9512), (2378, 8788), (3016, 6929), (4264, 4901), (4394, 4756)]