20765780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6449}}^1$

素因数の和:6488

約数の個数: 48

約数和(自身を含む): 52012800

約数和(自身を除く): 31247020

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 6449, 12898, 25796, 32245, 45143, 64490, 90286, 128980, 148327, 180572, 225715, 296654, 451430, 593308, 741635, 902860, 1038289, 1483270, 2076578, 2966540, 4153156, 5191445, 10382890, 20765780]

約数ペア:

[(1, 20765780), (2, 10382890), (4, 5191445), (5, 4153156), (7, 2966540), (10, 2076578), (14, 1483270), (20, 1038289), (23, 902860), (28, 741635), (35, 593308), (46, 451430), (70, 296654), (92, 225715), (115, 180572), (140, 148327), (161, 128980), (230, 90286), (322, 64490), (460, 45143), (644, 32245), (805, 25796), (1610, 12898), (3220, 6449)]