21107115

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{541}}^1$

素因数の和:589

約数の個数: 48

約数和(自身を含む): 39934560

約数和(自身を除く): 18827445

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 85, 135, 153, 255, 289, 459, 541, 765, 867, 1445, 1623, 2295, 2601, 2705, 4335, 4869, 7803, 8115, 9197, 13005, 14607, 24345, 27591, 39015, 45985, 73035, 82773, 137955, 156349, 248319, 413865, 469047, 781745, 1241595, 1407141, 2345235, 4221423, 7035705, 21107115]

約数ペア:

[(1, 21107115), (3, 7035705), (5, 4221423), (9, 2345235), (15, 1407141), (17, 1241595), (27, 781745), (45, 469047), (51, 413865), (85, 248319), (135, 156349), (153, 137955), (255, 82773), (289, 73035), (459, 45985), (541, 39015), (765, 27591), (867, 24345), (1445, 14607), (1623, 13005), (2295, 9197), (2601, 8115), (2705, 7803), (4335, 4869)]