209799980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{62071}}^1$

素因数の和:62106

約数の個数: 36

約数和(自身を含む): 477085392

約数和(自身を除く): 267285412

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 62071, 124142, 248284, 310355, 620710, 806923, 1241420, 1613846, 3227692, 4034615, 8069230, 10489999, 16138460, 20979998, 41959996, 52449995, 104899990, 209799980]

約数ペア:

[(1, 209799980), (2, 104899990), (4, 52449995), (5, 41959996), (10, 20979998), (13, 16138460), (20, 10489999), (26, 8069230), (52, 4034615), (65, 3227692), (130, 1613846), (169, 1241420), (260, 806923), (338, 620710), (676, 310355), (845, 248284), (1690, 124142), (3380, 62071)]