21103490

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{1019}}^1$

素因数の和:1154

約数の個数: 32

約数和(自身を含む): 40392000

約数和(自身を除く): 19288510

約数列:

[1, 2, 5, 10, 19, 38, 95, 109, 190, 218, 545, 1019, 1090, 2038, 2071, 4142, 5095, 10190, 10355, 19361, 20710, 38722, 96805, 111071, 193610, 222142, 555355, 1110710, 2110349, 4220698, 10551745, 21103490]

約数ペア:

[(1, 21103490), (2, 10551745), (5, 4220698), (10, 2110349), (19, 1110710), (38, 555355), (95, 222142), (109, 193610), (190, 111071), (218, 96805), (545, 38722), (1019, 20710), (1090, 19361), (2038, 10355), (2071, 10190), (4142, 5095)]