19956508

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{251}}^1$

素因数の和:418

約数の個数: 48

約数和(自身を含む): 41489280

約数和(自身を除く): 21532772

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 139, 143, 251, 278, 286, 502, 556, 572, 1004, 1529, 1807, 2761, 3058, 3263, 3614, 5522, 6116, 6526, 7228, 11044, 13052, 19877, 34889, 35893, 39754, 69778, 71786, 79508, 139556, 143572, 383779, 453557, 767558, 907114, 1535116, 1814228, 4989127, 9978254, 19956508]

約数ペア:

[(1, 19956508), (2, 9978254), (4, 4989127), (11, 1814228), (13, 1535116), (22, 907114), (26, 767558), (44, 453557), (52, 383779), (139, 143572), (143, 139556), (251, 79508), (278, 71786), (286, 69778), (502, 39754), (556, 35893), (572, 34889), (1004, 19877), (1529, 13052), (1807, 11044), (2761, 7228), (3058, 6526), (3263, 6116), (3614, 5522)]