21028410

素因数分解:

$2^1\times 3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1997}}^1$

素因数の和:2029

約数の個数: 80

約数和(自身を含む): 60923016

約数和(自身を除く): 39894606

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, 1997, 2106, 3510, 3994, 5265, 5991, 9985, 10530, 11982, 17973, 19970, 25961, 29955, 35946, 51922, 53919, 59910, 77883, 89865, 107838, 129805, 155766, 161757, 179730, 233649, 259610, 269595, 323514, 389415, 467298, 539190, 700947, 778830, 808785, 1168245, 1401894, 1617570, 2102841, 2336490, 3504735, 4205682, 7009470, 10514205, 21028410]

約数ペア:

[(1, 21028410), (2, 10514205), (3, 7009470), (5, 4205682), (6, 3504735), (9, 2336490), (10, 2102841), (13, 1617570), (15, 1401894), (18, 1168245), (26, 808785), (27, 778830), (30, 700947), (39, 539190), (45, 467298), (54, 389415), (65, 323514), (78, 269595), (81, 259610), (90, 233649), (117, 179730), (130, 161757), (135, 155766), (162, 129805), (195, 107838), (234, 89865), (270, 77883), (351, 59910), (390, 53919), (405, 51922), (585, 35946), (702, 29955), (810, 25961), (1053, 19970), (1170, 17973), (1755, 11982), (1997, 10530), (2106, 9985), (3510, 5991), (3994, 5265)]