21281235

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{839}}^1$

素因数の和:955

約数の個数: 32

約数和(自身を含む): 36288000

約数和(自身を除く): 15006765

約数列:

[1, 3, 5, 15, 19, 57, 89, 95, 267, 285, 445, 839, 1335, 1691, 2517, 4195, 5073, 8455, 12585, 15941, 25365, 47823, 74671, 79705, 224013, 239115, 373355, 1120065, 1418749, 4256247, 7093745, 21281235]

約数ペア:

[(1, 21281235), (3, 7093745), (5, 4256247), (15, 1418749), (19, 1120065), (57, 373355), (89, 239115), (95, 224013), (267, 79705), (285, 74671), (445, 47823), (839, 25365), (1335, 15941), (1691, 12585), (2517, 8455), (4195, 5073)]