18960720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{199}}^1\times {\mathrm{397}}^1$

素因数の和:612

約数の個数: 80

約数和(自身を含む): 59222400

約数和(自身を除く): 40261680

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 199, 240, 397, 398, 597, 794, 796, 995, 1191, 1194, 1588, 1592, 1985, 1990, 2382, 2388, 2985, 3176, 3184, 3970, 3980, 4764, 4776, 5955, 5970, 6352, 7940, 7960, 9528, 9552, 11910, 11940, 15880, 15920, 19056, 23820, 23880, 31760, 47640, 47760, 79003, 95280, 158006, 237009, 316012, 395015, 474018, 632024, 790030, 948036, 1185045, 1264048, 1580060, 1896072, 2370090, 3160120, 3792144, 4740180, 6320240, 9480360, 18960720]

約数ペア:

[(1, 18960720), (2, 9480360), (3, 6320240), (4, 4740180), (5, 3792144), (6, 3160120), (8, 2370090), (10, 1896072), (12, 1580060), (15, 1264048), (16, 1185045), (20, 948036), (24, 790030), (30, 632024), (40, 474018), (48, 395015), (60, 316012), (80, 237009), (120, 158006), (199, 95280), (240, 79003), (397, 47760), (398, 47640), (597, 31760), (794, 23880), (796, 23820), (995, 19056), (1191, 15920), (1194, 15880), (1588, 11940), (1592, 11910), (1985, 9552), (1990, 9528), (2382, 7960), (2388, 7940), (2985, 6352), (3176, 5970), (3184, 5955), (3970, 4776), (3980, 4764)]