21686340

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27803}}^1$

素因数の和:27828

約数の個数: 48

約数和(自身を含む): 65395008

約数和(自身を除く): 43708668

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27803, 55606, 83409, 111212, 139015, 166818, 278030, 333636, 361439, 417045, 556060, 722878, 834090, 1084317, 1445756, 1668180, 1807195, 2168634, 3614390, 4337268, 5421585, 7228780, 10843170, 21686340]

約数ペア:

[(1, 21686340), (2, 10843170), (3, 7228780), (4, 5421585), (5, 4337268), (6, 3614390), (10, 2168634), (12, 1807195), (13, 1668180), (15, 1445756), (20, 1084317), (26, 834090), (30, 722878), (39, 556060), (52, 417045), (60, 361439), (65, 333636), (78, 278030), (130, 166818), (156, 139015), (195, 111212), (260, 83409), (390, 55606), (780, 27803)]