21283905

素因数分解:

$3^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{107}}^1\times {\mathrm{149}}^1$

素因数の和:353

約数の個数: 32

約数和(自身を含む): 34992000

約数和(自身を除く): 13708095

約数列:

[1, 3, 5, 15, 89, 107, 149, 267, 321, 445, 447, 535, 745, 1335, 1605, 2235, 9523, 13261, 15943, 28569, 39783, 47615, 47829, 66305, 79715, 142845, 198915, 239145, 1418927, 4256781, 7094635, 21283905]

約数ペア:

[(1, 21283905), (3, 7094635), (5, 4256781), (15, 1418927), (89, 239145), (107, 198915), (149, 142845), (267, 79715), (321, 66305), (445, 47829), (447, 47615), (535, 39783), (745, 28569), (1335, 15943), (1605, 13261), (2235, 9523)]