40818880

素因数分解:

$2^6\times 5^1\times {\mathrm{199}}^1\times {\mathrm{641}}^1$

素因数の和:857

約数の個数: 56

約数和(自身を含む): 97840800

約数和(自身を除く): 57021920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 199, 320, 398, 641, 796, 995, 1282, 1592, 1990, 2564, 3184, 3205, 3980, 5128, 6368, 6410, 7960, 10256, 12736, 12820, 15920, 20512, 25640, 31840, 41024, 51280, 63680, 102560, 127559, 205120, 255118, 510236, 637795, 1020472, 1275590, 2040944, 2551180, 4081888, 5102360, 8163776, 10204720, 20409440, 40818880]

約数ペア:

[(1, 40818880), (2, 20409440), (4, 10204720), (5, 8163776), (8, 5102360), (10, 4081888), (16, 2551180), (20, 2040944), (32, 1275590), (40, 1020472), (64, 637795), (80, 510236), (160, 255118), (199, 205120), (320, 127559), (398, 102560), (641, 63680), (796, 51280), (995, 41024), (1282, 31840), (1592, 25640), (1990, 20512), (2564, 15920), (3184, 12820), (3205, 12736), (3980, 10256), (5128, 7960), (6368, 6410)]