28780456

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{431}}^1\times {\mathrm{491}}^1$

素因数の和:945

約数の個数: 32

約数和(自身を含む): 57386880

約数和(自身を除く): 28606424

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 431, 491, 862, 982, 1724, 1964, 3448, 3928, 7327, 8347, 14654, 16694, 29308, 33388, 58616, 66776, 211621, 423242, 846484, 1692968, 3597557, 7195114, 14390228, 28780456]

約数ペア:

[(1, 28780456), (2, 14390228), (4, 7195114), (8, 3597557), (17, 1692968), (34, 846484), (68, 423242), (136, 211621), (431, 66776), (491, 58616), (862, 33388), (982, 29308), (1724, 16694), (1964, 14654), (3448, 8347), (3928, 7327)]