21611810

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{53}}^1\times {\mathrm{337}}^1$

素因数の和:419

約数の個数: 48

約数和(自身を含む): 43695288

約数和(自身を除く): 22083478

約数列:

[1, 2, 5, 10, 11, 22, 53, 55, 106, 110, 121, 242, 265, 337, 530, 583, 605, 674, 1166, 1210, 1685, 2915, 3370, 3707, 5830, 6413, 7414, 12826, 17861, 18535, 32065, 35722, 37070, 40777, 64130, 81554, 89305, 178610, 196471, 203885, 392942, 407770, 982355, 1964710, 2161181, 4322362, 10805905, 21611810]

約数ペア:

[(1, 21611810), (2, 10805905), (5, 4322362), (10, 2161181), (11, 1964710), (22, 982355), (53, 407770), (55, 392942), (106, 203885), (110, 196471), (121, 178610), (242, 89305), (265, 81554), (337, 64130), (530, 40777), (583, 37070), (605, 35722), (674, 32065), (1166, 18535), (1210, 17861), (1685, 12826), (2915, 7414), (3370, 6413), (3707, 5830)]