21661264

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{821}}^1$

素因数の和:943

約数の個数: 40

約数和(自身を含む): 44950248

約数和(自身を除く): 23288984

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 97, 136, 194, 272, 388, 776, 821, 1552, 1642, 1649, 3284, 3298, 6568, 6596, 13136, 13192, 13957, 26384, 27914, 55828, 79637, 111656, 159274, 223312, 318548, 637096, 1274192, 1353829, 2707658, 5415316, 10830632, 21661264]

約数ペア:

[(1, 21661264), (2, 10830632), (4, 5415316), (8, 2707658), (16, 1353829), (17, 1274192), (34, 637096), (68, 318548), (97, 223312), (136, 159274), (194, 111656), (272, 79637), (388, 55828), (776, 27914), (821, 26384), (1552, 13957), (1642, 13192), (1649, 13136), (3284, 6596), (3298, 6568)]