21087340

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{211}}^1\times {\mathrm{263}}^1$

素因数の和:502

約数の個数: 48

約数和(自身を含む): 47013120

約数和(自身を除く): 25925780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 211, 263, 380, 422, 526, 844, 1052, 1055, 1315, 2110, 2630, 4009, 4220, 4997, 5260, 8018, 9994, 16036, 19988, 20045, 24985, 40090, 49970, 55493, 80180, 99940, 110986, 221972, 277465, 554930, 1054367, 1109860, 2108734, 4217468, 5271835, 10543670, 21087340]

約数ペア:

[(1, 21087340), (2, 10543670), (4, 5271835), (5, 4217468), (10, 2108734), (19, 1109860), (20, 1054367), (38, 554930), (76, 277465), (95, 221972), (190, 110986), (211, 99940), (263, 80180), (380, 55493), (422, 49970), (526, 40090), (844, 24985), (1052, 20045), (1055, 19988), (1315, 16036), (2110, 9994), (2630, 8018), (4009, 5260), (4220, 4997)]