21893456

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1571}}^1$

素因数の和:1659

約数の個数: 40

約数和(自身を含む): 46392864

約数和(自身を除く): 24499408

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 104, 134, 208, 268, 536, 871, 1072, 1571, 1742, 3142, 3484, 6284, 6968, 12568, 13936, 20423, 25136, 40846, 81692, 105257, 163384, 210514, 326768, 421028, 842056, 1368341, 1684112, 2736682, 5473364, 10946728, 21893456]

約数ペア:

[(1, 21893456), (2, 10946728), (4, 5473364), (8, 2736682), (13, 1684112), (16, 1368341), (26, 842056), (52, 421028), (67, 326768), (104, 210514), (134, 163384), (208, 105257), (268, 81692), (536, 40846), (871, 25136), (1072, 20423), (1571, 13936), (1742, 12568), (3142, 6968), (3484, 6284)]