21012012

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{199}}^1\times {\mathrm{419}}^1$

素因数の和:635

約数の個数: 72

約数和(自身を含む): 61152000

約数和(自身を除く): 40139988

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 199, 252, 398, 419, 597, 796, 838, 1194, 1257, 1393, 1676, 1791, 2388, 2514, 2786, 2933, 3582, 3771, 4179, 5028, 5572, 5866, 7164, 7542, 8358, 8799, 11732, 12537, 15084, 16716, 17598, 25074, 26397, 35196, 50148, 52794, 83381, 105588, 166762, 250143, 333524, 500286, 583667, 750429, 1000572, 1167334, 1500858, 1751001, 2334668, 3001716, 3502002, 5253003, 7004004, 10506006, 21012012]

約数ペア:

[(1, 21012012), (2, 10506006), (3, 7004004), (4, 5253003), (6, 3502002), (7, 3001716), (9, 2334668), (12, 1751001), (14, 1500858), (18, 1167334), (21, 1000572), (28, 750429), (36, 583667), (42, 500286), (63, 333524), (84, 250143), (126, 166762), (199, 105588), (252, 83381), (398, 52794), (419, 50148), (597, 35196), (796, 26397), (838, 25074), (1194, 17598), (1257, 16716), (1393, 15084), (1676, 12537), (1791, 11732), (2388, 8799), (2514, 8358), (2786, 7542), (2933, 7164), (3582, 5866), (3771, 5572), (4179, 5028)]