21160485

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1$

素因数の和:298

約数の個数: 48

約数和(自身を含む): 38413440

約数和(自身を除く): 17252955

約数列:

[1, 3, 5, 9, 15, 37, 45, 71, 111, 179, 185, 213, 333, 355, 537, 555, 639, 895, 1065, 1611, 1665, 2627, 2685, 3195, 6623, 7881, 8055, 12709, 13135, 19869, 23643, 33115, 38127, 39405, 59607, 63545, 99345, 114381, 118215, 190635, 298035, 470233, 571905, 1410699, 2351165, 4232097, 7053495, 21160485]

約数ペア:

[(1, 21160485), (3, 7053495), (5, 4232097), (9, 2351165), (15, 1410699), (37, 571905), (45, 470233), (71, 298035), (111, 190635), (179, 118215), (185, 114381), (213, 99345), (333, 63545), (355, 59607), (537, 39405), (555, 38127), (639, 33115), (895, 23643), (1065, 19869), (1611, 13135), (1665, 12709), (2627, 8055), (2685, 7881), (3195, 6623)]