20989728

素因数分解:

$2^5\times 3^2\times {\mathrm{31}}^1\times {\mathrm{2351}}^1$

素因数の和:2398

約数の個数: 72

約数和(自身を含む): 61641216

約数和(自身を除く): 40651488

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 31, 32, 36, 48, 62, 72, 93, 96, 124, 144, 186, 248, 279, 288, 372, 496, 558, 744, 992, 1116, 1488, 2232, 2351, 2976, 4464, 4702, 7053, 8928, 9404, 14106, 18808, 21159, 28212, 37616, 42318, 56424, 72881, 75232, 84636, 112848, 145762, 169272, 218643, 225696, 291524, 338544, 437286, 583048, 655929, 677088, 874572, 1166096, 1311858, 1749144, 2332192, 2623716, 3498288, 5247432, 6996576, 10494864, 20989728]

約数ペア:

[(1, 20989728), (2, 10494864), (3, 6996576), (4, 5247432), (6, 3498288), (8, 2623716), (9, 2332192), (12, 1749144), (16, 1311858), (18, 1166096), (24, 874572), (31, 677088), (32, 655929), (36, 583048), (48, 437286), (62, 338544), (72, 291524), (93, 225696), (96, 218643), (124, 169272), (144, 145762), (186, 112848), (248, 84636), (279, 75232), (288, 72881), (372, 56424), (496, 42318), (558, 37616), (744, 28212), (992, 21159), (1116, 18808), (1488, 14106), (2232, 9404), (2351, 8928), (2976, 7053), (4464, 4702)]