991221280

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{28549}}^1$

素因数の和:28602

約数の個数: 96

約数和(自身を含む): 2762726400

約数和(自身を除く): 1771505120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 56, 62, 70, 80, 112, 124, 140, 155, 160, 217, 224, 248, 280, 310, 434, 496, 560, 620, 868, 992, 1085, 1120, 1240, 1736, 2170, 2480, 3472, 4340, 4960, 6944, 8680, 17360, 28549, 34720, 57098, 114196, 142745, 199843, 228392, 285490, 399686, 456784, 570980, 799372, 885019, 913568, 999215, 1141960, 1598744, 1770038, 1998430, 2283920, 3197488, 3540076, 3996860, 4425095, 4567840, 6195133, 6394976, 7080152, 7993720, 8850190, 12390266, 14160304, 15987440, 17700380, 24780532, 28320608, 30975665, 31974880, 35400760, 49561064, 61951330, 70801520, 99122128, 123902660, 141603040, 198244256, 247805320, 495610640, 991221280]

約数ペア:

[(1, 991221280), (2, 495610640), (4, 247805320), (5, 198244256), (7, 141603040), (8, 123902660), (10, 99122128), (14, 70801520), (16, 61951330), (20, 49561064), (28, 35400760), (31, 31974880), (32, 30975665), (35, 28320608), (40, 24780532), (56, 17700380), (62, 15987440), (70, 14160304), (80, 12390266), (112, 8850190), (124, 7993720), (140, 7080152), (155, 6394976), (160, 6195133), (217, 4567840), (224, 4425095), (248, 3996860), (280, 3540076), (310, 3197488), (434, 2283920), (496, 1998430), (560, 1770038), (620, 1598744), (868, 1141960), (992, 999215), (1085, 913568), (1120, 885019), (1240, 799372), (1736, 570980), (2170, 456784), (2480, 399686), (3472, 285490), (4340, 228392), (4960, 199843), (6944, 142745), (8680, 114196), (17360, 57098), (28549, 34720)]