21387730

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1237}}^1$

素因数の和:1283

約数の個数: 64

約数和(自身を含む): 49916160

約数和(自身を除く): 28528430

約数列:

[1, 2, 5, 7, 10, 13, 14, 19, 26, 35, 38, 65, 70, 91, 95, 130, 133, 182, 190, 247, 266, 455, 494, 665, 910, 1235, 1237, 1330, 1729, 2470, 2474, 3458, 6185, 8645, 8659, 12370, 16081, 17290, 17318, 23503, 32162, 43295, 47006, 80405, 86590, 112567, 117515, 160810, 164521, 225134, 235030, 305539, 329042, 562835, 611078, 822605, 1125670, 1527695, 1645210, 2138773, 3055390, 4277546, 10693865, 21387730]

約数ペア:

[(1, 21387730), (2, 10693865), (5, 4277546), (7, 3055390), (10, 2138773), (13, 1645210), (14, 1527695), (19, 1125670), (26, 822605), (35, 611078), (38, 562835), (65, 329042), (70, 305539), (91, 235030), (95, 225134), (130, 164521), (133, 160810), (182, 117515), (190, 112567), (247, 86590), (266, 80405), (455, 47006), (494, 43295), (665, 32162), (910, 23503), (1235, 17318), (1237, 17290), (1330, 16081), (1729, 12370), (2470, 8659), (2474, 8645), (3458, 6185)]