21061960

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{7213}}^1$

素因数の和:7297

約数の個数: 32

約数和(自身を含む): 48045240

約数和(自身を除く): 26983280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 7213, 14426, 28852, 36065, 57704, 72130, 144260, 288520, 526549, 1053098, 2106196, 2632745, 4212392, 5265490, 10530980, 21061960]

約数ペア:

[(1, 21061960), (2, 10530980), (4, 5265490), (5, 4212392), (8, 2632745), (10, 2106196), (20, 1053098), (40, 526549), (73, 288520), (146, 144260), (292, 72130), (365, 57704), (584, 36065), (730, 28852), (1460, 14426), (2920, 7213)]