19905908

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{389}}^1\times {\mathrm{1163}}^1$

素因数の和:1567

約数の個数: 24

約数和(自身を含む): 38132640

約数和(自身を除く): 18226732

約数列:

[1, 2, 4, 11, 22, 44, 389, 778, 1163, 1556, 2326, 4279, 4652, 8558, 12793, 17116, 25586, 51172, 452407, 904814, 1809628, 4976477, 9952954, 19905908]

約数ペア:

[(1, 19905908), (2, 9952954), (4, 4976477), (11, 1809628), (22, 904814), (44, 452407), (389, 51172), (778, 25586), (1163, 17116), (1556, 12793), (2326, 8558), (4279, 4652)]