21000496995

素因数分解:

$3^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{1103257}}^1$

素因数の和:1103321

約数の個数: 40

約数和(自身を含む): 38446334784

約数和(自身を除く): 17445837789

約数列:

[1, 3, 5, 9, 15, 27, 45, 47, 81, 135, 141, 235, 405, 423, 705, 1269, 2115, 3807, 6345, 19035, 1103257, 3309771, 5516285, 9929313, 16548855, 29787939, 49646565, 51853079, 89363817, 148939695, 155559237, 259265395, 446819085, 466677711, 777796185, 1400033133, 2333388555, 4200099399, 7000165665, 21000496995]

約数ペア:

[(1, 21000496995), (3, 7000165665), (5, 4200099399), (9, 2333388555), (15, 1400033133), (27, 777796185), (45, 466677711), (47, 446819085), (81, 259265395), (135, 155559237), (141, 148939695), (235, 89363817), (405, 51853079), (423, 49646565), (705, 29787939), (1269, 16548855), (2115, 9929313), (3807, 5516285), (6345, 3309771), (19035, 1103257)]