21431223

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{359}}^1$

素因数の和:449

約数の個数: 40

約数和(自身を含む): 35544960

約数和(自身を除く): 14113737

約数列:

[1, 3, 9, 11, 27, 33, 67, 81, 99, 201, 297, 359, 603, 737, 891, 1077, 1809, 2211, 3231, 3949, 5427, 6633, 9693, 11847, 19899, 24053, 29079, 35541, 59697, 72159, 106623, 216477, 264583, 319869, 649431, 793749, 1948293, 2381247, 7143741, 21431223]

約数ペア:

[(1, 21431223), (3, 7143741), (9, 2381247), (11, 1948293), (27, 793749), (33, 649431), (67, 319869), (81, 264583), (99, 216477), (201, 106623), (297, 72159), (359, 59697), (603, 35541), (737, 29079), (891, 24053), (1077, 19899), (1809, 11847), (2211, 9693), (3231, 6633), (3949, 5427)]