21123135

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{307}}^1$

素因数の和:468

約数の個数: 48

約数和(自身を含む): 40360320

約数和(自身を除く): 19237185

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 139, 165, 307, 417, 495, 695, 921, 1251, 1529, 1535, 2085, 2763, 3377, 4587, 4605, 6255, 7645, 10131, 13761, 13815, 16885, 22935, 30393, 42673, 50655, 68805, 128019, 151965, 213365, 384057, 469403, 640095, 1408209, 1920285, 2347015, 4224627, 7041045, 21123135]

約数ペア:

[(1, 21123135), (3, 7041045), (5, 4224627), (9, 2347015), (11, 1920285), (15, 1408209), (33, 640095), (45, 469403), (55, 384057), (99, 213365), (139, 151965), (165, 128019), (307, 68805), (417, 50655), (495, 42673), (695, 30393), (921, 22935), (1251, 16885), (1529, 13815), (1535, 13761), (2085, 10131), (2763, 7645), (3377, 6255), (4587, 4605)]