20874825

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^2\times {\mathrm{257}}^1$

素因数の和:311

約数の個数: 54

約数和(自身を含む): 39614094

約数和(自身を除く): 18739269

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 75, 95, 171, 225, 257, 285, 361, 475, 771, 855, 1083, 1285, 1425, 1805, 2313, 3249, 3855, 4275, 4883, 5415, 6425, 9025, 11565, 14649, 16245, 19275, 24415, 27075, 43947, 57825, 73245, 81225, 92777, 122075, 219735, 278331, 366225, 463885, 834993, 1098675, 1391655, 2319425, 4174965, 6958275, 20874825]

約数ペア:

[(1, 20874825), (3, 6958275), (5, 4174965), (9, 2319425), (15, 1391655), (19, 1098675), (25, 834993), (45, 463885), (57, 366225), (75, 278331), (95, 219735), (171, 122075), (225, 92777), (257, 81225), (285, 73245), (361, 57825), (475, 43947), (771, 27075), (855, 24415), (1083, 19275), (1285, 16245), (1425, 14649), (1805, 11565), (2313, 9025), (3249, 6425), (3855, 5415), (4275, 4883)]