9997988

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{227}}^1$

素因数の和:273

約数の個数: 72

約数和(自身を含む): 23774016

約数和(自身を除く): 13776028

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 44, 52, 77, 91, 121, 143, 154, 182, 227, 242, 286, 308, 364, 454, 484, 572, 847, 908, 1001, 1573, 1589, 1694, 2002, 2497, 2951, 3146, 3178, 3388, 4004, 4994, 5902, 6292, 6356, 9988, 11011, 11804, 17479, 20657, 22022, 27467, 32461, 34958, 41314, 44044, 54934, 64922, 69916, 82628, 109868, 129844, 192269, 227227, 357071, 384538, 454454, 714142, 769076, 908908, 1428284, 2499497, 4998994, 9997988]

約数ペア:

[(1, 9997988), (2, 4998994), (4, 2499497), (7, 1428284), (11, 908908), (13, 769076), (14, 714142), (22, 454454), (26, 384538), (28, 357071), (44, 227227), (52, 192269), (77, 129844), (91, 109868), (121, 82628), (143, 69916), (154, 64922), (182, 54934), (227, 44044), (242, 41314), (286, 34958), (308, 32461), (364, 27467), (454, 22022), (484, 20657), (572, 17479), (847, 11804), (908, 11011), (1001, 9988), (1573, 6356), (1589, 6292), (1694, 5902), (2002, 4994), (2497, 4004), (2951, 3388), (3146, 3178)]