20491155

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{397}}^1$

素因数の和:476

約数の個数: 48

約数和(自身を含む): 37749504

約数和(自身を除く): 17258349

約数列:

[1, 3, 5, 9, 15, 31, 37, 45, 93, 111, 155, 185, 279, 333, 397, 465, 555, 1147, 1191, 1395, 1665, 1985, 3441, 3573, 5735, 5955, 10323, 12307, 14689, 17205, 17865, 36921, 44067, 51615, 61535, 73445, 110763, 132201, 184605, 220335, 455359, 553815, 661005, 1366077, 2276795, 4098231, 6830385, 20491155]

約数ペア:

[(1, 20491155), (3, 6830385), (5, 4098231), (9, 2276795), (15, 1366077), (31, 661005), (37, 553815), (45, 455359), (93, 220335), (111, 184605), (155, 132201), (185, 110763), (279, 73445), (333, 61535), (397, 51615), (465, 44067), (555, 36921), (1147, 17865), (1191, 17205), (1395, 14689), (1665, 12307), (1985, 10323), (3441, 5955), (3573, 5735)]