21578355

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{421}}^1$

素因数の和:516

約数の個数: 48

約数和(自身を含む): 40289184

約数和(自身を除く): 18710829

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 67, 85, 153, 201, 255, 335, 421, 603, 765, 1005, 1139, 1263, 2105, 3015, 3417, 3789, 5695, 6315, 7157, 10251, 17085, 18945, 21471, 28207, 35785, 51255, 64413, 84621, 107355, 141035, 253863, 322065, 423105, 479519, 1269315, 1438557, 2397595, 4315671, 7192785, 21578355]

約数ペア:

[(1, 21578355), (3, 7192785), (5, 4315671), (9, 2397595), (15, 1438557), (17, 1269315), (45, 479519), (51, 423105), (67, 322065), (85, 253863), (153, 141035), (201, 107355), (255, 84621), (335, 64413), (421, 51255), (603, 35785), (765, 28207), (1005, 21471), (1139, 18945), (1263, 17085), (2105, 10251), (3015, 7157), (3417, 6315), (3789, 5695)]