21760947

素因数分解:

$3^3\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{251}}^1$

素因数の和:305

約数の個数: 48

約数和(自身を含む): 36892800

約数和(自身を除く): 15131853

約数列:

[1, 3, 9, 13, 19, 27, 39, 57, 117, 169, 171, 247, 251, 351, 507, 513, 741, 753, 1521, 2223, 2259, 3211, 3263, 4563, 4769, 6669, 6777, 9633, 9789, 14307, 28899, 29367, 42419, 42921, 61997, 86697, 88101, 127257, 128763, 185991, 381771, 557973, 805961, 1145313, 1673919, 2417883, 7253649, 21760947]

約数ペア:

[(1, 21760947), (3, 7253649), (9, 2417883), (13, 1673919), (19, 1145313), (27, 805961), (39, 557973), (57, 381771), (117, 185991), (169, 128763), (171, 127257), (247, 88101), (251, 86697), (351, 61997), (507, 42921), (513, 42419), (741, 29367), (753, 28899), (1521, 14307), (2223, 9789), (2259, 9633), (3211, 6777), (3263, 6669), (4563, 4769)]