12980500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{1997}}^1$

素因数の和:2029

約数の個数: 48

約数和(自身を含む): 30545424

約数和(自身を除く): 17564924

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 500, 650, 1300, 1625, 1997, 3250, 3994, 6500, 7988, 9985, 19970, 25961, 39940, 49925, 51922, 99850, 103844, 129805, 199700, 249625, 259610, 499250, 519220, 649025, 998500, 1298050, 2596100, 3245125, 6490250, 12980500]

約数ペア:

[(1, 12980500), (2, 6490250), (4, 3245125), (5, 2596100), (10, 1298050), (13, 998500), (20, 649025), (25, 519220), (26, 499250), (50, 259610), (52, 249625), (65, 199700), (100, 129805), (125, 103844), (130, 99850), (250, 51922), (260, 49925), (325, 39940), (500, 25961), (650, 19970), (1300, 9985), (1625, 7988), (1997, 6500), (3250, 3994)]