21144860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{431}}^1$

素因数の和:674

約数の個数: 48

約数和(自身を含む): 48771072

約数和(自身を除く): 27626212

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 223, 431, 446, 862, 892, 1115, 1724, 2155, 2230, 2453, 4310, 4460, 4741, 4906, 8620, 9482, 9812, 12265, 18964, 23705, 24530, 47410, 49060, 94820, 96113, 192226, 384452, 480565, 961130, 1057243, 1922260, 2114486, 4228972, 5286215, 10572430, 21144860]

約数ペア:

[(1, 21144860), (2, 10572430), (4, 5286215), (5, 4228972), (10, 2114486), (11, 1922260), (20, 1057243), (22, 961130), (44, 480565), (55, 384452), (110, 192226), (220, 96113), (223, 94820), (431, 49060), (446, 47410), (862, 24530), (892, 23705), (1115, 18964), (1724, 12265), (2155, 9812), (2230, 9482), (2453, 8620), (4310, 4906), (4460, 4741)]