21536475

素因数分解:

$3^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{157}}^1$

素因数の和:260

約数の個数: 48

約数和(自身を含む): 37616640

約数和(自身を除く): 16080165

約数列:

[1, 3, 5, 15, 25, 31, 59, 75, 93, 155, 157, 177, 295, 465, 471, 775, 785, 885, 1475, 1829, 2325, 2355, 3925, 4425, 4867, 5487, 9145, 9263, 11775, 14601, 24335, 27435, 27789, 45725, 46315, 73005, 121675, 137175, 138945, 231575, 287153, 365025, 694725, 861459, 1435765, 4307295, 7178825, 21536475]

約数ペア:

[(1, 21536475), (3, 7178825), (5, 4307295), (15, 1435765), (25, 861459), (31, 694725), (59, 365025), (75, 287153), (93, 231575), (155, 138945), (157, 137175), (177, 121675), (295, 73005), (465, 46315), (471, 45725), (775, 27789), (785, 27435), (885, 24335), (1475, 14601), (1829, 11775), (2325, 9263), (2355, 9145), (3925, 5487), (4425, 4867)]