21589840

素因数分解:

$2^4\times 5^1\times {\mathrm{401}}^1\times {\mathrm{673}}^1$

素因数の和:1087

約数の個数: 40

約数和(自身を含む): 50396328

約数和(自身を除く): 28806488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 401, 673, 802, 1346, 1604, 2005, 2692, 3208, 3365, 4010, 5384, 6416, 6730, 8020, 10768, 13460, 16040, 26920, 32080, 53840, 269873, 539746, 1079492, 1349365, 2158984, 2698730, 4317968, 5397460, 10794920, 21589840]

約数ペア:

[(1, 21589840), (2, 10794920), (4, 5397460), (5, 4317968), (8, 2698730), (10, 2158984), (16, 1349365), (20, 1079492), (40, 539746), (80, 269873), (401, 53840), (673, 32080), (802, 26920), (1346, 16040), (1604, 13460), (2005, 10768), (2692, 8020), (3208, 6730), (3365, 6416), (4010, 5384)]