21613788

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{199}}^1\times {\mathrm{431}}^1$

素因数の和:647

約数の個数: 72

約数和(自身を含む): 62899200

約数和(自身を除く): 41285412

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 199, 252, 398, 431, 597, 796, 862, 1194, 1293, 1393, 1724, 1791, 2388, 2586, 2786, 3017, 3582, 3879, 4179, 5172, 5572, 6034, 7164, 7758, 8358, 9051, 12068, 12537, 15516, 16716, 18102, 25074, 27153, 36204, 50148, 54306, 85769, 108612, 171538, 257307, 343076, 514614, 600383, 771921, 1029228, 1200766, 1543842, 1801149, 2401532, 3087684, 3602298, 5403447, 7204596, 10806894, 21613788]

約数ペア:

[(1, 21613788), (2, 10806894), (3, 7204596), (4, 5403447), (6, 3602298), (7, 3087684), (9, 2401532), (12, 1801149), (14, 1543842), (18, 1200766), (21, 1029228), (28, 771921), (36, 600383), (42, 514614), (63, 343076), (84, 257307), (126, 171538), (199, 108612), (252, 85769), (398, 54306), (431, 50148), (597, 36204), (796, 27153), (862, 25074), (1194, 18102), (1293, 16716), (1393, 15516), (1724, 12537), (1791, 12068), (2388, 9051), (2586, 8358), (2786, 7758), (3017, 7164), (3582, 6034), (3879, 5572), (4179, 5172)]