20398215

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{167}}^1\times {\mathrm{479}}^1$

素因数の和:671

約数の個数: 32

約数和(自身を含む): 34836480

約数和(自身を除く): 14438265

約数列:

[1, 3, 5, 15, 17, 51, 85, 167, 255, 479, 501, 835, 1437, 2395, 2505, 2839, 7185, 8143, 8517, 14195, 24429, 40715, 42585, 79993, 122145, 239979, 399965, 1199895, 1359881, 4079643, 6799405, 20398215]

約数ペア:

[(1, 20398215), (3, 6799405), (5, 4079643), (15, 1359881), (17, 1199895), (51, 399965), (85, 239979), (167, 122145), (255, 79993), (479, 42585), (501, 40715), (835, 24429), (1437, 14195), (2395, 8517), (2505, 8143), (2839, 7185)]