21389264

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{263}}^1$

素因数の和:324

約数の個数: 80

約数和(自身を含む): 49496832

約数和(自身を除く): 28107568

約数列:

[1, 2, 4, 8, 13, 16, 17, 23, 26, 34, 46, 52, 68, 92, 104, 136, 184, 208, 221, 263, 272, 299, 368, 391, 442, 526, 598, 782, 884, 1052, 1196, 1564, 1768, 2104, 2392, 3128, 3419, 3536, 4208, 4471, 4784, 5083, 6049, 6256, 6838, 8942, 10166, 12098, 13676, 17884, 20332, 24196, 27352, 35768, 40664, 48392, 54704, 58123, 71536, 78637, 81328, 96784, 102833, 116246, 157274, 205666, 232492, 314548, 411332, 464984, 629096, 822664, 929968, 1258192, 1336829, 1645328, 2673658, 5347316, 10694632, 21389264]

約数ペア:

[(1, 21389264), (2, 10694632), (4, 5347316), (8, 2673658), (13, 1645328), (16, 1336829), (17, 1258192), (23, 929968), (26, 822664), (34, 629096), (46, 464984), (52, 411332), (68, 314548), (92, 232492), (104, 205666), (136, 157274), (184, 116246), (208, 102833), (221, 96784), (263, 81328), (272, 78637), (299, 71536), (368, 58123), (391, 54704), (442, 48392), (526, 40664), (598, 35768), (782, 27352), (884, 24196), (1052, 20332), (1196, 17884), (1564, 13676), (1768, 12098), (2104, 10166), (2392, 8942), (3128, 6838), (3419, 6256), (3536, 6049), (4208, 5083), (4471, 4784)]