18993825

素因数分解:

$3^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{1481}}^1$

素因数の和:1519

約数の個数: 48

約数和(自身を含む): 36753600

約数和(自身を除く): 17759775

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 45, 57, 75, 95, 135, 171, 225, 285, 475, 513, 675, 855, 1425, 1481, 2565, 4275, 4443, 7405, 12825, 13329, 22215, 28139, 37025, 39987, 66645, 84417, 111075, 140695, 199935, 253251, 333225, 422085, 703475, 759753, 999675, 1266255, 2110425, 3798765, 6331275, 18993825]

約数ペア:

[(1, 18993825), (3, 6331275), (5, 3798765), (9, 2110425), (15, 1266255), (19, 999675), (25, 759753), (27, 703475), (45, 422085), (57, 333225), (75, 253251), (95, 199935), (135, 140695), (171, 111075), (225, 84417), (285, 66645), (475, 39987), (513, 37025), (675, 28139), (855, 22215), (1425, 13329), (1481, 12825), (2565, 7405), (4275, 4443)]