21853895

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{557}}^1$

素因数の和:647

約数の個数: 32

約数和(自身を含む): 32140800

約数和(自身を除く): 10286905

約数列:

[1, 5, 7, 19, 35, 59, 95, 133, 295, 413, 557, 665, 1121, 2065, 2785, 3899, 5605, 7847, 10583, 19495, 32863, 39235, 52915, 74081, 164315, 230041, 370405, 624397, 1150205, 3121985, 4370779, 21853895]

約数ペア:

[(1, 21853895), (5, 4370779), (7, 3121985), (19, 1150205), (35, 624397), (59, 370405), (95, 230041), (133, 164315), (295, 74081), (413, 52915), (557, 39235), (665, 32863), (1121, 19495), (2065, 10583), (2785, 7847), (3899, 5605)]