20857815

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1453}}^1$

素因数の和:1504

約数の個数: 48

約数和(自身を含む): 40828320

約数和(自身を除く): 19970505

約数列:

[1, 3, 5, 9, 11, 15, 29, 33, 45, 55, 87, 99, 145, 165, 261, 319, 435, 495, 957, 1305, 1453, 1595, 2871, 4359, 4785, 7265, 13077, 14355, 15983, 21795, 42137, 47949, 65385, 79915, 126411, 143847, 210685, 239745, 379233, 463507, 632055, 719235, 1390521, 1896165, 2317535, 4171563, 6952605, 20857815]

約数ペア:

[(1, 20857815), (3, 6952605), (5, 4171563), (9, 2317535), (11, 1896165), (15, 1390521), (29, 719235), (33, 632055), (45, 463507), (55, 379233), (87, 239745), (99, 210685), (145, 143847), (165, 126411), (261, 79915), (319, 65385), (435, 47949), (495, 42137), (957, 21795), (1305, 15983), (1453, 14355), (1595, 13077), (2871, 7265), (4359, 4785)]