18891225

素因数分解:

$3^4\times 5^2\times {\mathrm{19}}^1\times {\mathrm{491}}^1$

素因数の和:532

約数の個数: 60

約数和(自身を含む): 36909840

約数和(自身を除く): 18018615

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 45, 57, 75, 81, 95, 135, 171, 225, 285, 405, 475, 491, 513, 675, 855, 1425, 1473, 1539, 2025, 2455, 2565, 4275, 4419, 7365, 7695, 9329, 12275, 12825, 13257, 22095, 27987, 36825, 38475, 39771, 46645, 66285, 83961, 110475, 139935, 198855, 233225, 251883, 331425, 419805, 699675, 755649, 994275, 1259415, 2099025, 3778245, 6297075, 18891225]

約数ペア:

[(1, 18891225), (3, 6297075), (5, 3778245), (9, 2099025), (15, 1259415), (19, 994275), (25, 755649), (27, 699675), (45, 419805), (57, 331425), (75, 251883), (81, 233225), (95, 198855), (135, 139935), (171, 110475), (225, 83961), (285, 66285), (405, 46645), (475, 39771), (491, 38475), (513, 36825), (675, 27987), (855, 22095), (1425, 13257), (1473, 12825), (1539, 12275), (2025, 9329), (2455, 7695), (2565, 7365), (4275, 4419)]