21808740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{107}}^1$

素因数の和:241

約数の個数: 96

約数和(自身を含む): 63866880

約数和(自身を除く): 42058140

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 43, 60, 79, 86, 107, 129, 158, 172, 214, 215, 237, 258, 316, 321, 395, 428, 430, 474, 516, 535, 642, 645, 790, 860, 948, 1070, 1185, 1284, 1290, 1580, 1605, 2140, 2370, 2580, 3210, 3397, 4601, 4740, 6420, 6794, 8453, 9202, 10191, 13588, 13803, 16906, 16985, 18404, 20382, 23005, 25359, 27606, 33812, 33970, 40764, 42265, 46010, 50718, 50955, 55212, 67940, 69015, 84530, 92020, 101436, 101910, 126795, 138030, 169060, 203820, 253590, 276060, 363479, 507180, 726958, 1090437, 1453916, 1817395, 2180874, 3634790, 4361748, 5452185, 7269580, 10904370, 21808740]

約数ペア:

[(1, 21808740), (2, 10904370), (3, 7269580), (4, 5452185), (5, 4361748), (6, 3634790), (10, 2180874), (12, 1817395), (15, 1453916), (20, 1090437), (30, 726958), (43, 507180), (60, 363479), (79, 276060), (86, 253590), (107, 203820), (129, 169060), (158, 138030), (172, 126795), (214, 101910), (215, 101436), (237, 92020), (258, 84530), (316, 69015), (321, 67940), (395, 55212), (428, 50955), (430, 50718), (474, 46010), (516, 42265), (535, 40764), (642, 33970), (645, 33812), (790, 27606), (860, 25359), (948, 23005), (1070, 20382), (1185, 18404), (1284, 16985), (1290, 16906), (1580, 13803), (1605, 13588), (2140, 10191), (2370, 9202), (2580, 8453), (3210, 6794), (3397, 6420), (4601, 4740)]