21259605

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{263}}^1\times {\mathrm{317}}^1$

素因数の和:605

約数の個数: 32

約数和(自身を含む): 36267264

約数和(自身を除く): 15007659

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 263, 317, 789, 951, 1315, 1585, 3945, 4471, 4755, 5389, 13413, 16167, 22355, 26945, 67065, 80835, 83371, 250113, 416855, 1250565, 1417307, 4251921, 7086535, 21259605]

約数ペア:

[(1, 21259605), (3, 7086535), (5, 4251921), (15, 1417307), (17, 1250565), (51, 416855), (85, 250113), (255, 83371), (263, 80835), (317, 67065), (789, 26945), (951, 22355), (1315, 16167), (1585, 13413), (3945, 5389), (4471, 4755)]