21049470

素因数分解:

$2^1\times 3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1999}}^1$

素因数の和:2031

約数の個数: 80

約数和(自身を含む): 60984000

約数和(自身を除く): 39934530

約数列:

[1, 2, 3, 5, 6, 9, 10, 13, 15, 18, 26, 27, 30, 39, 45, 54, 65, 78, 81, 90, 117, 130, 135, 162, 195, 234, 270, 351, 390, 405, 585, 702, 810, 1053, 1170, 1755, 1999, 2106, 3510, 3998, 5265, 5997, 9995, 10530, 11994, 17991, 19990, 25987, 29985, 35982, 51974, 53973, 59970, 77961, 89955, 107946, 129935, 155922, 161919, 179910, 233883, 259870, 269865, 323838, 389805, 467766, 539730, 701649, 779610, 809595, 1169415, 1403298, 1619190, 2104947, 2338830, 3508245, 4209894, 7016490, 10524735, 21049470]

約数ペア:

[(1, 21049470), (2, 10524735), (3, 7016490), (5, 4209894), (6, 3508245), (9, 2338830), (10, 2104947), (13, 1619190), (15, 1403298), (18, 1169415), (26, 809595), (27, 779610), (30, 701649), (39, 539730), (45, 467766), (54, 389805), (65, 323838), (78, 269865), (81, 259870), (90, 233883), (117, 179910), (130, 161919), (135, 155922), (162, 129935), (195, 107946), (234, 89955), (270, 77961), (351, 59970), (390, 53973), (405, 51974), (585, 35982), (702, 29985), (810, 25987), (1053, 19990), (1170, 17991), (1755, 11994), (1999, 10530), (2106, 9995), (3510, 5997), (3998, 5265)]