1989765

素因数分解:

$3^4\times 5^1\times {\mathrm{17}}^3$

素因数の和:68

約数の個数: 40

約数和(自身を含む): 3789720

約数和(自身を除く): 1799955

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 81, 85, 135, 153, 255, 289, 405, 459, 765, 867, 1377, 1445, 2295, 2601, 4335, 4913, 6885, 7803, 13005, 14739, 23409, 24565, 39015, 44217, 73695, 117045, 132651, 221085, 397953, 663255, 1989765]

約数ペア:

[(1, 1989765), (3, 663255), (5, 397953), (9, 221085), (15, 132651), (17, 117045), (27, 73695), (45, 44217), (51, 39015), (81, 24565), (85, 23409), (135, 14739), (153, 13005), (255, 7803), (289, 6885), (405, 4913), (459, 4335), (765, 2601), (867, 2295), (1377, 1445)]