21497528

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{2131}}^1$

素因数の和:2247

約数の個数: 32

約数和(自身を含む): 43876560

約数和(自身を除く): 22379032

約数列:

[1, 2, 4, 8, 13, 26, 52, 97, 104, 194, 388, 776, 1261, 2131, 2522, 4262, 5044, 8524, 10088, 17048, 27703, 55406, 110812, 206707, 221624, 413414, 826828, 1653656, 2687191, 5374382, 10748764, 21497528]

約数ペア:

[(1, 21497528), (2, 10748764), (4, 5374382), (8, 2687191), (13, 1653656), (26, 826828), (52, 413414), (97, 221624), (104, 206707), (194, 110812), (388, 55406), (776, 27703), (1261, 17048), (2131, 10088), (2522, 8524), (4262, 5044)]