20819554

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1$

素因数の和:175

約数の個数: 64

約数和(自身を含む): 40642560

約数和(自身を除く): 19823006

約数列:

[1, 2, 7, 14, 19, 23, 38, 41, 46, 82, 83, 133, 161, 166, 266, 287, 322, 437, 574, 581, 779, 874, 943, 1162, 1558, 1577, 1886, 1909, 3059, 3154, 3403, 3818, 5453, 6118, 6601, 6806, 10906, 11039, 13202, 13363, 17917, 22078, 23821, 26726, 35834, 36271, 47642, 64657, 72542, 78269, 125419, 129314, 156538, 250838, 253897, 452599, 507794, 547883, 905198, 1095766, 1487111, 2974222, 10409777, 20819554]

約数ペア:

[(1, 20819554), (2, 10409777), (7, 2974222), (14, 1487111), (19, 1095766), (23, 905198), (38, 547883), (41, 507794), (46, 452599), (82, 253897), (83, 250838), (133, 156538), (161, 129314), (166, 125419), (266, 78269), (287, 72542), (322, 64657), (437, 47642), (574, 36271), (581, 35834), (779, 26726), (874, 23821), (943, 22078), (1162, 17917), (1558, 13363), (1577, 13202), (1886, 11039), (1909, 10906), (3059, 6806), (3154, 6601), (3403, 6118), (3818, 5453)]