20865474

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{41}}^1\times {\mathrm{577}}^1$

素因数の和:640

約数の個数: 72

約数和(自身を含む): 53965548

約数和(自身を除く): 33100074

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 41, 42, 49, 63, 82, 98, 123, 126, 147, 246, 287, 294, 369, 441, 574, 577, 738, 861, 882, 1154, 1722, 1731, 2009, 2583, 3462, 4018, 4039, 5166, 5193, 6027, 8078, 10386, 12054, 12117, 18081, 23657, 24234, 28273, 36162, 36351, 47314, 56546, 70971, 72702, 84819, 141942, 165599, 169638, 212913, 254457, 331198, 425826, 496797, 508914, 993594, 1159193, 1490391, 2318386, 2980782, 3477579, 6955158, 10432737, 20865474]

約数ペア:

[(1, 20865474), (2, 10432737), (3, 6955158), (6, 3477579), (7, 2980782), (9, 2318386), (14, 1490391), (18, 1159193), (21, 993594), (41, 508914), (42, 496797), (49, 425826), (63, 331198), (82, 254457), (98, 212913), (123, 169638), (126, 165599), (147, 141942), (246, 84819), (287, 72702), (294, 70971), (369, 56546), (441, 47314), (574, 36351), (577, 36162), (738, 28273), (861, 24234), (882, 23657), (1154, 18081), (1722, 12117), (1731, 12054), (2009, 10386), (2583, 8078), (3462, 6027), (4018, 5193), (4039, 5166)]