17965720

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{199}}^1$

素因数の和:308

約数の個数: 64

約数和(自身を含む): 42408000

約数和(自身を除く): 24442280

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 61, 74, 122, 148, 185, 199, 244, 296, 305, 370, 398, 488, 610, 740, 796, 995, 1220, 1480, 1592, 1990, 2257, 2440, 3980, 4514, 7363, 7960, 9028, 11285, 12139, 14726, 18056, 22570, 24278, 29452, 36815, 45140, 48556, 58904, 60695, 73630, 90280, 97112, 121390, 147260, 242780, 294520, 449143, 485560, 898286, 1796572, 2245715, 3593144, 4491430, 8982860, 17965720]

約数ペア:

[(1, 17965720), (2, 8982860), (4, 4491430), (5, 3593144), (8, 2245715), (10, 1796572), (20, 898286), (37, 485560), (40, 449143), (61, 294520), (74, 242780), (122, 147260), (148, 121390), (185, 97112), (199, 90280), (244, 73630), (296, 60695), (305, 58904), (370, 48556), (398, 45140), (488, 36815), (610, 29452), (740, 24278), (796, 22570), (995, 18056), (1220, 14726), (1480, 12139), (1592, 11285), (1990, 9028), (2257, 7960), (2440, 7363), (3980, 4514)]