21992775

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{163}}^1\times {\mathrm{257}}^1$

素因数の和:440

約数の個数: 48

約数和(自身を含む): 41973504

約数和(自身を除く): 19980729

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 163, 175, 257, 489, 525, 771, 815, 1141, 1285, 1799, 2445, 3423, 3855, 4075, 5397, 5705, 6425, 8995, 12225, 17115, 19275, 26985, 28525, 41891, 44975, 85575, 125673, 134925, 209455, 293237, 628365, 879711, 1047275, 1466185, 3141825, 4398555, 7330925, 21992775]

約数ペア:

[(1, 21992775), (3, 7330925), (5, 4398555), (7, 3141825), (15, 1466185), (21, 1047275), (25, 879711), (35, 628365), (75, 293237), (105, 209455), (163, 134925), (175, 125673), (257, 85575), (489, 44975), (525, 41891), (771, 28525), (815, 26985), (1141, 19275), (1285, 17115), (1799, 12225), (2445, 8995), (3423, 6425), (3855, 5705), (4075, 5397)]