7872020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{137}}^1$

素因数の和:189

約数の個数: 72

約数和(自身を含む): 19092024

約数和(自身を除く): 11220004

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 137, 169, 170, 221, 260, 274, 338, 340, 442, 548, 676, 685, 845, 884, 1105, 1370, 1690, 1781, 2210, 2329, 2740, 2873, 3380, 3562, 4420, 4658, 5746, 7124, 8905, 9316, 11492, 11645, 14365, 17810, 23153, 23290, 28730, 30277, 35620, 46306, 46580, 57460, 60554, 92612, 115765, 121108, 151385, 231530, 302770, 393601, 463060, 605540, 787202, 1574404, 1968005, 3936010, 7872020]

約数ペア:

[(1, 7872020), (2, 3936010), (4, 1968005), (5, 1574404), (10, 787202), (13, 605540), (17, 463060), (20, 393601), (26, 302770), (34, 231530), (52, 151385), (65, 121108), (68, 115765), (85, 92612), (130, 60554), (137, 57460), (169, 46580), (170, 46306), (221, 35620), (260, 30277), (274, 28730), (338, 23290), (340, 23153), (442, 17810), (548, 14365), (676, 11645), (685, 11492), (845, 9316), (884, 8905), (1105, 7124), (1370, 5746), (1690, 4658), (1781, 4420), (2210, 3562), (2329, 3380), (2740, 2873)]