21398355

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{311}}^1$

素因数の和:472

約数の個数: 48

約数和(自身を含む): 40884480

約数和(自身を除く): 19486125

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 139, 165, 311, 417, 495, 695, 933, 1251, 1529, 1555, 2085, 2799, 3421, 4587, 4665, 6255, 7645, 10263, 13761, 13995, 17105, 22935, 30789, 43229, 51315, 68805, 129687, 153945, 216145, 389061, 475519, 648435, 1426557, 1945305, 2377595, 4279671, 7132785, 21398355]

約数ペア:

[(1, 21398355), (3, 7132785), (5, 4279671), (9, 2377595), (11, 1945305), (15, 1426557), (33, 648435), (45, 475519), (55, 389061), (99, 216145), (139, 153945), (165, 129687), (311, 68805), (417, 51315), (495, 43229), (695, 30789), (933, 22935), (1251, 17105), (1529, 13995), (1555, 13761), (2085, 10263), (2799, 7645), (3421, 6255), (4587, 4665)]