20459720

素因数分解:

$2^3\times 5^1\times {\mathrm{617}}^1\times {\mathrm{829}}^1$

素因数の和:1457

約数の個数: 32

約数和(自身を含む): 46164600

約数和(自身を除く): 25704880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 617, 829, 1234, 1658, 2468, 3085, 3316, 4145, 4936, 6170, 6632, 8290, 12340, 16580, 24680, 33160, 511493, 1022986, 2045972, 2557465, 4091944, 5114930, 10229860, 20459720]

約数ペア:

[(1, 20459720), (2, 10229860), (4, 5114930), (5, 4091944), (8, 2557465), (10, 2045972), (20, 1022986), (40, 511493), (617, 33160), (829, 24680), (1234, 16580), (1658, 12340), (2468, 8290), (3085, 6632), (3316, 6170), (4145, 4936)]