19874855

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2$

素因数の和:85

約数の個数: 72

約数和(自身を含む): 34052256

約数和(自身を除く): 14177401

約数列:

[1, 5, 7, 11, 13, 19, 35, 55, 65, 77, 91, 95, 121, 133, 143, 209, 247, 361, 385, 455, 605, 665, 715, 847, 1001, 1045, 1235, 1463, 1573, 1729, 1805, 2299, 2527, 2717, 3971, 4235, 4693, 5005, 7315, 7865, 8645, 11011, 11495, 12635, 13585, 16093, 19019, 19855, 23465, 27797, 29887, 32851, 43681, 51623, 55055, 80465, 95095, 138985, 149435, 164255, 209209, 218405, 258115, 305767, 361361, 567853, 1046045, 1528835, 1806805, 2839265, 3974971, 19874855]

約数ペア:

[(1, 19874855), (5, 3974971), (7, 2839265), (11, 1806805), (13, 1528835), (19, 1046045), (35, 567853), (55, 361361), (65, 305767), (77, 258115), (91, 218405), (95, 209209), (121, 164255), (133, 149435), (143, 138985), (209, 95095), (247, 80465), (361, 55055), (385, 51623), (455, 43681), (605, 32851), (665, 29887), (715, 27797), (847, 23465), (1001, 19855), (1045, 19019), (1235, 16093), (1463, 13585), (1573, 12635), (1729, 11495), (1805, 11011), (2299, 8645), (2527, 7865), (2717, 7315), (3971, 5005), (4235, 4693)]