21395445

素因数分解:

$3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{349}}^1$

素因数の和:485

約数の個数: 32

約数和(自身を含む): 35414400

約数和(自身を除く): 14018955

約数列:

[1, 3, 5, 15, 61, 67, 183, 201, 305, 335, 349, 915, 1005, 1047, 1745, 4087, 5235, 12261, 20435, 21289, 23383, 61305, 63867, 70149, 106445, 116915, 319335, 350745, 1426363, 4279089, 7131815, 21395445]

約数ペア:

[(1, 21395445), (3, 7131815), (5, 4279089), (15, 1426363), (61, 350745), (67, 319335), (183, 116915), (201, 106445), (305, 70149), (335, 63867), (349, 61305), (915, 23383), (1005, 21289), (1047, 20435), (1745, 12261), (4087, 5235)]