21112515

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{8231}}^1$

素因数の和:8264

約数の個数: 32

約数和(自身を含む): 39513600

約数和(自身を除く): 18401085

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 95, 135, 171, 285, 513, 855, 2565, 8231, 24693, 41155, 74079, 123465, 156389, 222237, 370395, 469167, 781945, 1111185, 1407501, 2345835, 4222503, 7037505, 21112515]

約数ペア:

[(1, 21112515), (3, 7037505), (5, 4222503), (9, 2345835), (15, 1407501), (19, 1111185), (27, 781945), (45, 469167), (57, 370395), (95, 222237), (135, 156389), (171, 123465), (285, 74079), (513, 41155), (855, 24693), (2565, 8231)]