21004918

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1621}}^1$

素因数の和:1684

約数の個数: 32

約数和(自身を含む): 37370880

約数和(自身を除く): 16365962

約数列:

[1, 2, 11, 19, 22, 31, 38, 62, 209, 341, 418, 589, 682, 1178, 1621, 3242, 6479, 12958, 17831, 30799, 35662, 50251, 61598, 100502, 338789, 552761, 677578, 954769, 1105522, 1909538, 10502459, 21004918]

約数ペア:

[(1, 21004918), (2, 10502459), (11, 1909538), (19, 1105522), (22, 954769), (31, 677578), (38, 552761), (62, 338789), (209, 100502), (341, 61598), (418, 50251), (589, 35662), (682, 30799), (1178, 17831), (1621, 12958), (3242, 6479)]