21389025

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{131}}^1\times {\mathrm{311}}^1$

素因数の和:462

約数の個数: 48

約数和(自身を含む): 40854528

約数和(自身を除く): 19465503

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 131, 175, 311, 393, 525, 655, 917, 933, 1555, 1965, 2177, 2751, 3275, 4585, 4665, 6531, 7775, 9825, 10885, 13755, 22925, 23325, 32655, 40741, 54425, 68775, 122223, 163275, 203705, 285187, 611115, 855561, 1018525, 1425935, 3055575, 4277805, 7129675, 21389025]

約数ペア:

[(1, 21389025), (3, 7129675), (5, 4277805), (7, 3055575), (15, 1425935), (21, 1018525), (25, 855561), (35, 611115), (75, 285187), (105, 203705), (131, 163275), (175, 122223), (311, 68775), (393, 54425), (525, 40741), (655, 32655), (917, 23325), (933, 22925), (1555, 13755), (1965, 10885), (2177, 9825), (2751, 7775), (3275, 6531), (4585, 4665)]