21491964

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2417}}^1$

素因数の和:2459

約数の個数: 72

約数和(自身を含む): 61610640

約数和(自身を除く): 40118676

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 19, 26, 36, 38, 39, 52, 57, 76, 78, 114, 117, 156, 171, 228, 234, 247, 342, 468, 494, 684, 741, 988, 1482, 2223, 2417, 2964, 4446, 4834, 7251, 8892, 9668, 14502, 21753, 29004, 31421, 43506, 45923, 62842, 87012, 91846, 94263, 125684, 137769, 183692, 188526, 275538, 282789, 377052, 413307, 551076, 565578, 596999, 826614, 1131156, 1193998, 1653228, 1790997, 2387996, 3581994, 5372991, 7163988, 10745982, 21491964]

約数ペア:

[(1, 21491964), (2, 10745982), (3, 7163988), (4, 5372991), (6, 3581994), (9, 2387996), (12, 1790997), (13, 1653228), (18, 1193998), (19, 1131156), (26, 826614), (36, 596999), (38, 565578), (39, 551076), (52, 413307), (57, 377052), (76, 282789), (78, 275538), (114, 188526), (117, 183692), (156, 137769), (171, 125684), (228, 94263), (234, 91846), (247, 87012), (342, 62842), (468, 45923), (494, 43506), (684, 31421), (741, 29004), (988, 21753), (1482, 14502), (2223, 9668), (2417, 8892), (2964, 7251), (4446, 4834)]