21079665

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^2\times {\mathrm{557}}^1$

素因数の和:626

約数の個数: 36

約数和(自身を含む): 37909404

約数和(自身を除く): 16829739

約数列:

[1, 3, 5, 9, 15, 29, 45, 87, 145, 261, 435, 557, 841, 1305, 1671, 2523, 2785, 4205, 5013, 7569, 8355, 12615, 16153, 25065, 37845, 48459, 80765, 145377, 242295, 468437, 726885, 1405311, 2342185, 4215933, 7026555, 21079665]

約数ペア:

[(1, 21079665), (3, 7026555), (5, 4215933), (9, 2342185), (15, 1405311), (29, 726885), (45, 468437), (87, 242295), (145, 145377), (261, 80765), (435, 48459), (557, 37845), (841, 25065), (1305, 16153), (1671, 12615), (2523, 8355), (2785, 7569), (4205, 5013)]