19908075

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{409}}^1$

素因数の和:492

約数の個数: 48

約数和(自身を含む): 36604800

約数和(自身を除く): 16696725

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 59, 75, 165, 177, 275, 295, 409, 649, 825, 885, 1227, 1475, 1947, 2045, 3245, 4425, 4499, 6135, 9735, 10225, 13497, 16225, 22495, 24131, 30675, 48675, 67485, 72393, 112475, 120655, 265441, 337425, 361965, 603275, 796323, 1327205, 1809825, 3981615, 6636025, 19908075]

約数ペア:

[(1, 19908075), (3, 6636025), (5, 3981615), (11, 1809825), (15, 1327205), (25, 796323), (33, 603275), (55, 361965), (59, 337425), (75, 265441), (165, 120655), (177, 112475), (275, 72393), (295, 67485), (409, 48675), (649, 30675), (825, 24131), (885, 22495), (1227, 16225), (1475, 13497), (1947, 10225), (2045, 9735), (3245, 6135), (4425, 4499)]