19854890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{269}}^1$

素因数の和:359

約数の個数: 48

約数和(自身を含む): 40075560

約数和(自身を除く): 20220670

約数列:

[1, 2, 5, 10, 11, 22, 55, 61, 110, 121, 122, 242, 269, 305, 538, 605, 610, 671, 1210, 1342, 1345, 2690, 2959, 3355, 5918, 6710, 7381, 14762, 14795, 16409, 29590, 32549, 32818, 36905, 65098, 73810, 82045, 162745, 164090, 180499, 325490, 360998, 902495, 1804990, 1985489, 3970978, 9927445, 19854890]

約数ペア:

[(1, 19854890), (2, 9927445), (5, 3970978), (10, 1985489), (11, 1804990), (22, 902495), (55, 360998), (61, 325490), (110, 180499), (121, 164090), (122, 162745), (242, 82045), (269, 73810), (305, 65098), (538, 36905), (605, 32818), (610, 32549), (671, 29590), (1210, 16409), (1342, 14795), (1345, 14762), (2690, 7381), (2959, 6710), (3355, 5918)]