21997120

素因数分解:

$2^6\times 5^1\times {\mathrm{53}}^1\times {\mathrm{1297}}^1$

素因数の和:1367

約数の個数: 56

約数和(自身を含む): 53410104

約数和(自身を除く): 31412984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 64, 80, 106, 160, 212, 265, 320, 424, 530, 848, 1060, 1297, 1696, 2120, 2594, 3392, 4240, 5188, 6485, 8480, 10376, 12970, 16960, 20752, 25940, 41504, 51880, 68741, 83008, 103760, 137482, 207520, 274964, 343705, 415040, 549928, 687410, 1099856, 1374820, 2199712, 2749640, 4399424, 5499280, 10998560, 21997120]

約数ペア:

[(1, 21997120), (2, 10998560), (4, 5499280), (5, 4399424), (8, 2749640), (10, 2199712), (16, 1374820), (20, 1099856), (32, 687410), (40, 549928), (53, 415040), (64, 343705), (80, 274964), (106, 207520), (160, 137482), (212, 103760), (265, 83008), (320, 68741), (424, 51880), (530, 41504), (848, 25940), (1060, 20752), (1297, 16960), (1696, 12970), (2120, 10376), (2594, 8480), (3392, 6485), (4240, 5188)]