21456180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{599}}^1$

素因数の和:813

約数の個数: 72

約数和(自身を含む): 65520000

約数和(自身を除く): 44063820

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 199, 398, 597, 599, 796, 995, 1194, 1198, 1791, 1797, 1990, 2388, 2396, 2985, 2995, 3582, 3594, 3980, 5391, 5970, 5990, 7164, 7188, 8955, 8985, 10782, 11940, 11980, 17910, 17970, 21564, 26955, 35820, 35940, 53910, 107820, 119201, 238402, 357603, 476804, 596005, 715206, 1072809, 1192010, 1430412, 1788015, 2145618, 2384020, 3576030, 4291236, 5364045, 7152060, 10728090, 21456180]

約数ペア:

[(1, 21456180), (2, 10728090), (3, 7152060), (4, 5364045), (5, 4291236), (6, 3576030), (9, 2384020), (10, 2145618), (12, 1788015), (15, 1430412), (18, 1192010), (20, 1072809), (30, 715206), (36, 596005), (45, 476804), (60, 357603), (90, 238402), (180, 119201), (199, 107820), (398, 53910), (597, 35940), (599, 35820), (796, 26955), (995, 21564), (1194, 17970), (1198, 17910), (1791, 11980), (1797, 11940), (1990, 10782), (2388, 8985), (2396, 8955), (2985, 7188), (2995, 7164), (3582, 5990), (3594, 5970), (3980, 5391)]