20961512

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{251}}^1$

素因数の和:354

約数の個数: 64

約数和(自身を含む): 46992960

約数和(自身を除く): 26031448

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 44, 52, 73, 88, 104, 143, 146, 251, 286, 292, 502, 572, 584, 803, 949, 1004, 1144, 1606, 1898, 2008, 2761, 3212, 3263, 3796, 5522, 6424, 6526, 7592, 10439, 11044, 13052, 18323, 20878, 22088, 26104, 35893, 36646, 41756, 71786, 73292, 83512, 143572, 146584, 201553, 238199, 287144, 403106, 476398, 806212, 952796, 1612424, 1905592, 2620189, 5240378, 10480756, 20961512]

約数ペア:

[(1, 20961512), (2, 10480756), (4, 5240378), (8, 2620189), (11, 1905592), (13, 1612424), (22, 952796), (26, 806212), (44, 476398), (52, 403106), (73, 287144), (88, 238199), (104, 201553), (143, 146584), (146, 143572), (251, 83512), (286, 73292), (292, 71786), (502, 41756), (572, 36646), (584, 35893), (803, 26104), (949, 22088), (1004, 20878), (1144, 18323), (1606, 13052), (1898, 11044), (2008, 10439), (2761, 7592), (3212, 6526), (3263, 6424), (3796, 5522)]