21449948

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{181}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 42378336

約数和(自身を除く): 20928388

約数列:

[1, 2, 4, 13, 26, 43, 52, 53, 86, 106, 172, 181, 212, 362, 559, 689, 724, 1118, 1378, 2236, 2279, 2353, 2756, 4558, 4706, 7783, 9116, 9412, 9593, 15566, 19186, 29627, 31132, 38372, 59254, 101179, 118508, 124709, 202358, 249418, 404716, 412499, 498836, 824998, 1649996, 5362487, 10724974, 21449948]

約数ペア:

[(1, 21449948), (2, 10724974), (4, 5362487), (13, 1649996), (26, 824998), (43, 498836), (52, 412499), (53, 404716), (86, 249418), (106, 202358), (172, 124709), (181, 118508), (212, 101179), (362, 59254), (559, 38372), (689, 31132), (724, 29627), (1118, 19186), (1378, 15566), (2236, 9593), (2279, 9412), (2353, 9116), (2756, 7783), (4558, 4706)]