21124395

素因数分解:

$3^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1213}}^1$

素因数の和:1273

約数の個数: 40

約数和(自身を含む): 38780016

約数和(自身を除く): 17655621

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 81, 129, 135, 215, 387, 405, 645, 1161, 1213, 1935, 3483, 3639, 5805, 6065, 10917, 17415, 18195, 32751, 52159, 54585, 98253, 156477, 163755, 260795, 469431, 491265, 782385, 1408293, 2347155, 4224879, 7041465, 21124395]

約数ペア:

[(1, 21124395), (3, 7041465), (5, 4224879), (9, 2347155), (15, 1408293), (27, 782385), (43, 491265), (45, 469431), (81, 260795), (129, 163755), (135, 156477), (215, 98253), (387, 54585), (405, 52159), (645, 32751), (1161, 18195), (1213, 17415), (1935, 10917), (3483, 6065), (3639, 5805)]