21947679

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1097}}^1$

素因数の和:1141

約数の個数: 40

約数和(自身を含む): 37200240

約数和(自身を除く): 15252561

約数列:

[1, 3, 9, 13, 19, 27, 39, 57, 81, 117, 171, 247, 351, 513, 741, 1053, 1097, 1539, 2223, 3291, 6669, 9873, 14261, 20007, 20843, 29619, 42783, 62529, 88857, 128349, 187587, 270959, 385047, 562761, 812877, 1155141, 1688283, 2438631, 7315893, 21947679]

約数ペア:

[(1, 21947679), (3, 7315893), (9, 2438631), (13, 1688283), (19, 1155141), (27, 812877), (39, 562761), (57, 385047), (81, 270959), (117, 187587), (171, 128349), (247, 88857), (351, 62529), (513, 42783), (741, 29619), (1053, 20843), (1097, 20007), (1539, 14261), (2223, 9873), (3291, 6669)]