21082856

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{199}}^1$

素因数の和:282

約数の個数: 64

約数和(自身を含む): 45360000

約数和(自身を除く): 24277144

約数列:

[1, 2, 4, 8, 17, 19, 34, 38, 41, 68, 76, 82, 136, 152, 164, 199, 323, 328, 398, 646, 697, 779, 796, 1292, 1394, 1558, 1592, 2584, 2788, 3116, 3383, 3781, 5576, 6232, 6766, 7562, 8159, 13243, 13532, 15124, 16318, 26486, 27064, 30248, 32636, 52972, 64277, 65272, 105944, 128554, 138703, 155021, 257108, 277406, 310042, 514216, 554812, 620084, 1109624, 1240168, 2635357, 5270714, 10541428, 21082856]

約数ペア:

[(1, 21082856), (2, 10541428), (4, 5270714), (8, 2635357), (17, 1240168), (19, 1109624), (34, 620084), (38, 554812), (41, 514216), (68, 310042), (76, 277406), (82, 257108), (136, 155021), (152, 138703), (164, 128554), (199, 105944), (323, 65272), (328, 64277), (398, 52972), (646, 32636), (697, 30248), (779, 27064), (796, 26486), (1292, 16318), (1394, 15124), (1558, 13532), (1592, 13243), (2584, 8159), (2788, 7562), (3116, 6766), (3383, 6232), (3781, 5576)]