21267195

素因数分解:

$3^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1\times {\mathrm{137}}^1$

素因数の和:355

約数の個数: 32

約数和(自身を含む): 34974720

約数和(自身を除く): 13707525

約数列:

[1, 3, 5, 15, 79, 131, 137, 237, 393, 395, 411, 655, 685, 1185, 1965, 2055, 10349, 10823, 17947, 31047, 32469, 51745, 53841, 54115, 89735, 155235, 162345, 269205, 1417813, 4253439, 7089065, 21267195]

約数ペア:

[(1, 21267195), (3, 7089065), (5, 4253439), (15, 1417813), (79, 269205), (131, 162345), (137, 155235), (237, 89735), (393, 54115), (395, 53841), (411, 51745), (655, 32469), (685, 31047), (1185, 17947), (1965, 10823), (2055, 10349)]