21689240

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{8093}}^1$

素因数の和:8171

約数の個数: 32

約数和(自身を含む): 49535280

約数和(自身を除く): 27846040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 8093, 16186, 32372, 40465, 64744, 80930, 161860, 323720, 542231, 1084462, 2168924, 2711155, 4337848, 5422310, 10844620, 21689240]

約数ペア:

[(1, 21689240), (2, 10844620), (4, 5422310), (5, 4337848), (8, 2711155), (10, 2168924), (20, 1084462), (40, 542231), (67, 323720), (134, 161860), (268, 80930), (335, 64744), (536, 40465), (670, 32372), (1340, 16186), (2680, 8093)]