277920890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{68963}}^1$

素因数の和:69014

約数の個数: 32

約数和(自身を含む): 556125696

約数和(自身を除く): 278204806

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 2015, 4030, 68963, 137926, 344815, 689630, 896519, 1793038, 2137853, 4275706, 4482595, 8965190, 10689265, 21378530, 27792089, 55584178, 138960445, 277920890]

約数ペア:

[(1, 277920890), (2, 138960445), (5, 55584178), (10, 27792089), (13, 21378530), (26, 10689265), (31, 8965190), (62, 4482595), (65, 4275706), (130, 2137853), (155, 1793038), (310, 896519), (403, 689630), (806, 344815), (2015, 137926), (4030, 68963)]