21667425

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{313}}^1$

素因数の和:410

約数の個数: 48

約数和(自身を含む): 39247488

約数和(自身を除く): 17580063

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 71, 75, 195, 213, 313, 325, 355, 923, 939, 975, 1065, 1565, 1775, 2769, 4069, 4615, 4695, 5325, 7825, 12207, 13845, 20345, 22223, 23075, 23475, 61035, 66669, 69225, 101725, 111115, 288899, 305175, 333345, 555575, 866697, 1444495, 1666725, 4333485, 7222475, 21667425]

約数ペア:

[(1, 21667425), (3, 7222475), (5, 4333485), (13, 1666725), (15, 1444495), (25, 866697), (39, 555575), (65, 333345), (71, 305175), (75, 288899), (195, 111115), (213, 101725), (313, 69225), (325, 66669), (355, 61035), (923, 23475), (939, 23075), (975, 22223), (1065, 20345), (1565, 13845), (1775, 12207), (2769, 7825), (4069, 5325), (4615, 4695)]