20379780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{101}}^1$

素因数の和:194

約数の個数: 144

約数和(自身を含む): 66830400

約数和(自身を除く): 46450620

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 38, 45, 57, 59, 60, 76, 90, 95, 101, 114, 118, 171, 177, 180, 190, 202, 228, 236, 285, 295, 303, 342, 354, 380, 404, 505, 531, 570, 590, 606, 684, 708, 855, 885, 909, 1010, 1062, 1121, 1140, 1180, 1212, 1515, 1710, 1770, 1818, 1919, 2020, 2124, 2242, 2655, 3030, 3363, 3420, 3540, 3636, 3838, 4484, 4545, 5310, 5605, 5757, 5959, 6060, 6726, 7676, 9090, 9595, 10089, 10620, 11210, 11514, 11918, 13452, 16815, 17271, 17877, 18180, 19190, 20178, 22420, 23028, 23836, 28785, 29795, 33630, 34542, 35754, 38380, 40356, 50445, 53631, 57570, 59590, 67260, 69084, 71508, 86355, 89385, 100890, 107262, 113221, 115140, 119180, 172710, 178770, 201780, 214524, 226442, 268155, 339663, 345420, 357540, 452884, 536310, 566105, 679326, 1018989, 1072620, 1132210, 1358652, 1698315, 2037978, 2264420, 3396630, 4075956, 5094945, 6793260, 10189890, 20379780]

約数ペア:

[(1, 20379780), (2, 10189890), (3, 6793260), (4, 5094945), (5, 4075956), (6, 3396630), (9, 2264420), (10, 2037978), (12, 1698315), (15, 1358652), (18, 1132210), (19, 1072620), (20, 1018989), (30, 679326), (36, 566105), (38, 536310), (45, 452884), (57, 357540), (59, 345420), (60, 339663), (76, 268155), (90, 226442), (95, 214524), (101, 201780), (114, 178770), (118, 172710), (171, 119180), (177, 115140), (180, 113221), (190, 107262), (202, 100890), (228, 89385), (236, 86355), (285, 71508), (295, 69084), (303, 67260), (342, 59590), (354, 57570), (380, 53631), (404, 50445), (505, 40356), (531, 38380), (570, 35754), (590, 34542), (606, 33630), (684, 29795), (708, 28785), (855, 23836), (885, 23028), (909, 22420), (1010, 20178), (1062, 19190), (1121, 18180), (1140, 17877), (1180, 17271), (1212, 16815), (1515, 13452), (1710, 11918), (1770, 11514), (1818, 11210), (1919, 10620), (2020, 10089), (2124, 9595), (2242, 9090), (2655, 7676), (3030, 6726), (3363, 6060), (3420, 5959), (3540, 5757), (3636, 5605), (3838, 5310), (4484, 4545)]