28767780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{2251}}^1$

素因数の和:2337

約数の個数: 72

約数和(自身を含む): 88530624

約数和(自身を除く): 59762844

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 71, 90, 142, 180, 213, 284, 355, 426, 639, 710, 852, 1065, 1278, 1420, 2130, 2251, 2556, 3195, 4260, 4502, 6390, 6753, 9004, 11255, 12780, 13506, 20259, 22510, 27012, 33765, 40518, 45020, 67530, 81036, 101295, 135060, 159821, 202590, 319642, 405180, 479463, 639284, 799105, 958926, 1438389, 1598210, 1917852, 2397315, 2876778, 3196420, 4794630, 5753556, 7191945, 9589260, 14383890, 28767780]

約数ペア:

[(1, 28767780), (2, 14383890), (3, 9589260), (4, 7191945), (5, 5753556), (6, 4794630), (9, 3196420), (10, 2876778), (12, 2397315), (15, 1917852), (18, 1598210), (20, 1438389), (30, 958926), (36, 799105), (45, 639284), (60, 479463), (71, 405180), (90, 319642), (142, 202590), (180, 159821), (213, 135060), (284, 101295), (355, 81036), (426, 67530), (639, 45020), (710, 40518), (852, 33765), (1065, 27012), (1278, 22510), (1420, 20259), (2130, 13506), (2251, 12780), (2556, 11255), (3195, 9004), (4260, 6753), (4502, 6390)]