28878880

素因数分解:

$2^5\times 5^1\times {\mathrm{199}}^1\times {\mathrm{907}}^1$

素因数の和:1121

約数の個数: 48

約数和(自身を含む): 68644800

約数和(自身を除く): 39765920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 199, 398, 796, 907, 995, 1592, 1814, 1990, 3184, 3628, 3980, 4535, 6368, 7256, 7960, 9070, 14512, 15920, 18140, 29024, 31840, 36280, 72560, 145120, 180493, 360986, 721972, 902465, 1443944, 1804930, 2887888, 3609860, 5775776, 7219720, 14439440, 28878880]

約数ペア:

[(1, 28878880), (2, 14439440), (4, 7219720), (5, 5775776), (8, 3609860), (10, 2887888), (16, 1804930), (20, 1443944), (32, 902465), (40, 721972), (80, 360986), (160, 180493), (199, 145120), (398, 72560), (796, 36280), (907, 31840), (995, 29024), (1592, 18140), (1814, 15920), (1990, 14512), (3184, 9070), (3628, 7960), (3980, 7256), (4535, 6368)]