21394976

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{587}}^1$

素因数の和:681

約数の個数: 48

約数和(自身を含む): 45341856

約数和(自身を除く): 23946880

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 67, 68, 134, 136, 268, 272, 536, 544, 587, 1072, 1139, 1174, 2144, 2278, 2348, 4556, 4696, 9112, 9392, 9979, 18224, 18784, 19958, 36448, 39329, 39916, 78658, 79832, 157316, 159664, 314632, 319328, 629264, 668593, 1258528, 1337186, 2674372, 5348744, 10697488, 21394976]

約数ペア:

[(1, 21394976), (2, 10697488), (4, 5348744), (8, 2674372), (16, 1337186), (17, 1258528), (32, 668593), (34, 629264), (67, 319328), (68, 314632), (134, 159664), (136, 157316), (268, 79832), (272, 78658), (536, 39916), (544, 39329), (587, 36448), (1072, 19958), (1139, 18784), (1174, 18224), (2144, 9979), (2278, 9392), (2348, 9112), (4556, 4696)]