20565784

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:188

約数の個数: 64

約数和(自身を含む): 43256160

約数和(自身を除く): 22690376

約数列:

[1, 2, 4, 8, 17, 34, 37, 61, 67, 68, 74, 122, 134, 136, 148, 244, 268, 296, 488, 536, 629, 1037, 1139, 1258, 2074, 2257, 2278, 2479, 2516, 4087, 4148, 4514, 4556, 4958, 5032, 8174, 8296, 9028, 9112, 9916, 16348, 18056, 19832, 32696, 38369, 42143, 69479, 76738, 84286, 138958, 151219, 153476, 168572, 277916, 302438, 306952, 337144, 555832, 604876, 1209752, 2570723, 5141446, 10282892, 20565784]

約数ペア:

[(1, 20565784), (2, 10282892), (4, 5141446), (8, 2570723), (17, 1209752), (34, 604876), (37, 555832), (61, 337144), (67, 306952), (68, 302438), (74, 277916), (122, 168572), (134, 153476), (136, 151219), (148, 138958), (244, 84286), (268, 76738), (296, 69479), (488, 42143), (536, 38369), (629, 32696), (1037, 19832), (1139, 18056), (1258, 16348), (2074, 9916), (2257, 9112), (2278, 9028), (2479, 8296), (2516, 8174), (4087, 5032), (4148, 4958), (4514, 4556)]