20210364880

素因数分解:

$2^4\times 5^1\times {\mathrm{647}}^1\times {\mathrm{390463}}^1$

素因数の和:391123

約数の個数: 40

約数和(自身を含む): 47061844992

約数和(自身を除く): 26851480112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 647, 1294, 2588, 3235, 5176, 6470, 10352, 12940, 25880, 51760, 390463, 780926, 1561852, 1952315, 3123704, 3904630, 6247408, 7809260, 15618520, 31237040, 252629561, 505259122, 1010518244, 1263147805, 2021036488, 2526295610, 4042072976, 5052591220, 10105182440, 20210364880]

約数ペア:

[(1, 20210364880), (2, 10105182440), (4, 5052591220), (5, 4042072976), (8, 2526295610), (10, 2021036488), (16, 1263147805), (20, 1010518244), (40, 505259122), (80, 252629561), (647, 31237040), (1294, 15618520), (2588, 7809260), (3235, 6247408), (5176, 3904630), (6470, 3123704), (10352, 1952315), (12940, 1561852), (25880, 780926), (51760, 390463)]