21077415

素因数分解:

$3^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{733}}^1$

素因数の和:821

約数の個数: 40

約数和(自身を含む): 38367648

約数和(自身を除く): 17290233

約数列:

[1, 3, 5, 9, 15, 27, 45, 71, 81, 135, 213, 355, 405, 639, 733, 1065, 1917, 2199, 3195, 3665, 5751, 6597, 9585, 10995, 19791, 28755, 32985, 52043, 59373, 98955, 156129, 260215, 296865, 468387, 780645, 1405161, 2341935, 4215483, 7025805, 21077415]

約数ペア:

[(1, 21077415), (3, 7025805), (5, 4215483), (9, 2341935), (15, 1405161), (27, 780645), (45, 468387), (71, 296865), (81, 260215), (135, 156129), (213, 98955), (355, 59373), (405, 52043), (639, 32985), (733, 28755), (1065, 19791), (1917, 10995), (2199, 9585), (3195, 6597), (3665, 5751)]