19801275

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{883}}^1$

素因数の和:932

約数の個数: 48

約数和(自身を含む): 36830976

約数和(自身を除く): 17029701

約数列:

[1, 3, 5, 13, 15, 23, 25, 39, 65, 69, 75, 115, 195, 299, 325, 345, 575, 883, 897, 975, 1495, 1725, 2649, 4415, 4485, 7475, 11479, 13245, 20309, 22075, 22425, 34437, 57395, 60927, 66225, 101545, 172185, 264017, 286975, 304635, 507725, 792051, 860925, 1320085, 1523175, 3960255, 6600425, 19801275]

約数ペア:

[(1, 19801275), (3, 6600425), (5, 3960255), (13, 1523175), (15, 1320085), (23, 860925), (25, 792051), (39, 507725), (65, 304635), (69, 286975), (75, 264017), (115, 172185), (195, 101545), (299, 66225), (325, 60927), (345, 57395), (575, 34437), (883, 22425), (897, 22075), (975, 20309), (1495, 13245), (1725, 11479), (2649, 7475), (4415, 4485)]