21249912

素因数分解:

$2^3\times 3^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{349}}^1$

素因数の和:460

約数の個数: 64

約数和(自身を含む): 55440000

約数和(自身を除く): 34190088

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 43, 59, 86, 118, 129, 172, 177, 236, 258, 344, 349, 354, 472, 516, 698, 708, 1032, 1047, 1396, 1416, 2094, 2537, 2792, 4188, 5074, 7611, 8376, 10148, 15007, 15222, 20296, 20591, 30014, 30444, 41182, 45021, 60028, 60888, 61773, 82364, 90042, 120056, 123546, 164728, 180084, 247092, 360168, 494184, 885413, 1770826, 2656239, 3541652, 5312478, 7083304, 10624956, 21249912]

約数ペア:

[(1, 21249912), (2, 10624956), (3, 7083304), (4, 5312478), (6, 3541652), (8, 2656239), (12, 1770826), (24, 885413), (43, 494184), (59, 360168), (86, 247092), (118, 180084), (129, 164728), (172, 123546), (177, 120056), (236, 90042), (258, 82364), (344, 61773), (349, 60888), (354, 60028), (472, 45021), (516, 41182), (698, 30444), (708, 30014), (1032, 20591), (1047, 20296), (1396, 15222), (1416, 15007), (2094, 10148), (2537, 8376), (2792, 7611), (4188, 5074)]