21463780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2663}}^1$

素因数の和:2716

約数の個数: 48

約数和(自身を含む): 50125824

約数和(自身を除く): 28662044

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 620, 806, 1612, 2015, 2663, 4030, 5326, 8060, 10652, 13315, 26630, 34619, 53260, 69238, 82553, 138476, 165106, 173095, 330212, 346190, 412765, 692380, 825530, 1073189, 1651060, 2146378, 4292756, 5365945, 10731890, 21463780]

約数ペア:

[(1, 21463780), (2, 10731890), (4, 5365945), (5, 4292756), (10, 2146378), (13, 1651060), (20, 1073189), (26, 825530), (31, 692380), (52, 412765), (62, 346190), (65, 330212), (124, 173095), (130, 165106), (155, 138476), (260, 82553), (310, 69238), (403, 53260), (620, 34619), (806, 26630), (1612, 13315), (2015, 10652), (2663, 8060), (4030, 5326)]