21787168

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{631}}^1$

素因数の和:737

約数の個数: 48

約数和(自身を含む): 46823616

約数和(自身を除く): 25036448

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 83, 104, 166, 208, 332, 416, 631, 664, 1079, 1262, 1328, 2158, 2524, 2656, 4316, 5048, 8203, 8632, 10096, 16406, 17264, 20192, 32812, 34528, 52373, 65624, 104746, 131248, 209492, 262496, 418984, 680849, 837968, 1361698, 1675936, 2723396, 5446792, 10893584, 21787168]

約数ペア:

[(1, 21787168), (2, 10893584), (4, 5446792), (8, 2723396), (13, 1675936), (16, 1361698), (26, 837968), (32, 680849), (52, 418984), (83, 262496), (104, 209492), (166, 131248), (208, 104746), (332, 65624), (416, 52373), (631, 34528), (664, 32812), (1079, 20192), (1262, 17264), (1328, 16406), (2158, 10096), (2524, 8632), (2656, 8203), (4316, 5048)]