21840399

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{211}}^1$

素因数の和:308

約数の個数: 48

約数和(自身を含む): 38098944

約数和(自身を除く): 16258545

約数列:

[1, 3, 7, 9, 21, 31, 53, 63, 93, 159, 211, 217, 279, 371, 477, 633, 651, 1113, 1477, 1643, 1899, 1953, 3339, 4431, 4929, 6541, 11183, 11501, 13293, 14787, 19623, 33549, 34503, 45787, 58869, 78281, 100647, 103509, 137361, 234843, 346673, 412083, 704529, 1040019, 2426711, 3120057, 7280133, 21840399]

約数ペア:

[(1, 21840399), (3, 7280133), (7, 3120057), (9, 2426711), (21, 1040019), (31, 704529), (53, 412083), (63, 346673), (93, 234843), (159, 137361), (211, 103509), (217, 100647), (279, 78281), (371, 58869), (477, 45787), (633, 34503), (651, 33549), (1113, 19623), (1477, 14787), (1643, 13293), (1899, 11501), (1953, 11183), (3339, 6541), (4431, 4929)]