21240828

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2719}}^1$

素因数の和:2767

約数の個数: 72

約数和(自身を含む): 63365120

約数和(自身を除く): 42124292

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 31, 36, 42, 62, 63, 84, 93, 124, 126, 186, 217, 252, 279, 372, 434, 558, 651, 868, 1116, 1302, 1953, 2604, 2719, 3906, 5438, 7812, 8157, 10876, 16314, 19033, 24471, 32628, 38066, 48942, 57099, 76132, 84289, 97884, 114198, 168578, 171297, 228396, 252867, 337156, 342594, 505734, 590023, 685188, 758601, 1011468, 1180046, 1517202, 1770069, 2360092, 3034404, 3540138, 5310207, 7080276, 10620414, 21240828]

約数ペア:

[(1, 21240828), (2, 10620414), (3, 7080276), (4, 5310207), (6, 3540138), (7, 3034404), (9, 2360092), (12, 1770069), (14, 1517202), (18, 1180046), (21, 1011468), (28, 758601), (31, 685188), (36, 590023), (42, 505734), (62, 342594), (63, 337156), (84, 252867), (93, 228396), (124, 171297), (126, 168578), (186, 114198), (217, 97884), (252, 84289), (279, 76132), (372, 57099), (434, 48942), (558, 38066), (651, 32628), (868, 24471), (1116, 19033), (1302, 16314), (1953, 10876), (2604, 8157), (2719, 7812), (3906, 5438)]