21390490

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{1193}}^1$

素因数の和:1374

約数の個数: 32

約数和(自身を含む): 42296256

約数和(自身を除く): 20905766

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 163, 326, 815, 1193, 1630, 1793, 2386, 3586, 5965, 8965, 11930, 13123, 17930, 26246, 65615, 131230, 194459, 388918, 972295, 1944590, 2139049, 4278098, 10695245, 21390490]

約数ペア:

[(1, 21390490), (2, 10695245), (5, 4278098), (10, 2139049), (11, 1944590), (22, 972295), (55, 388918), (110, 194459), (163, 131230), (326, 65615), (815, 26246), (1193, 17930), (1630, 13123), (1793, 11930), (2386, 8965), (3586, 5965)]