21527820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{601}}^1$

素因数の和:815

約数の個数: 72

約数和(自身を含む): 65738400

約数和(自身を除く): 44210580

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 199, 398, 597, 601, 796, 995, 1194, 1202, 1791, 1803, 1990, 2388, 2404, 2985, 3005, 3582, 3606, 3980, 5409, 5970, 6010, 7164, 7212, 8955, 9015, 10818, 11940, 12020, 17910, 18030, 21636, 27045, 35820, 36060, 54090, 108180, 119599, 239198, 358797, 478396, 597995, 717594, 1076391, 1195990, 1435188, 1793985, 2152782, 2391980, 3587970, 4305564, 5381955, 7175940, 10763910, 21527820]

約数ペア:

[(1, 21527820), (2, 10763910), (3, 7175940), (4, 5381955), (5, 4305564), (6, 3587970), (9, 2391980), (10, 2152782), (12, 1793985), (15, 1435188), (18, 1195990), (20, 1076391), (30, 717594), (36, 597995), (45, 478396), (60, 358797), (90, 239198), (180, 119599), (199, 108180), (398, 54090), (597, 36060), (601, 35820), (796, 27045), (995, 21636), (1194, 18030), (1202, 17910), (1791, 12020), (1803, 11940), (1990, 10818), (2388, 9015), (2404, 8955), (2985, 7212), (3005, 7164), (3582, 6010), (3606, 5970), (3980, 5409)]