20657916

素因数分解:

$2^2\times 3^5\times {\mathrm{53}}^1\times {\mathrm{401}}^1$

素因数の和:473

約数の個数: 72

約数和(自身を含む): 55311984

約数和(自身を除く): 34654068

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 53, 54, 81, 106, 108, 159, 162, 212, 243, 318, 324, 401, 477, 486, 636, 802, 954, 972, 1203, 1431, 1604, 1908, 2406, 2862, 3609, 4293, 4812, 5724, 7218, 8586, 10827, 12879, 14436, 17172, 21253, 21654, 25758, 32481, 42506, 43308, 51516, 63759, 64962, 85012, 97443, 127518, 129924, 191277, 194886, 255036, 382554, 389772, 573831, 765108, 1147662, 1721493, 2295324, 3442986, 5164479, 6885972, 10328958, 20657916]

約数ペア:

[(1, 20657916), (2, 10328958), (3, 6885972), (4, 5164479), (6, 3442986), (9, 2295324), (12, 1721493), (18, 1147662), (27, 765108), (36, 573831), (53, 389772), (54, 382554), (81, 255036), (106, 194886), (108, 191277), (159, 129924), (162, 127518), (212, 97443), (243, 85012), (318, 64962), (324, 63759), (401, 51516), (477, 43308), (486, 42506), (636, 32481), (802, 25758), (954, 21654), (972, 21253), (1203, 17172), (1431, 14436), (1604, 12879), (1908, 10827), (2406, 8586), (2862, 7218), (3609, 5724), (4293, 4812)]