280786660

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{61}}^2$

素因数の和:163

約数の個数: 144

約数和(自身を含む): 762652800

約数和(自身を除く): 481866140

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 61, 70, 77, 98, 110, 122, 140, 154, 196, 220, 244, 245, 305, 308, 343, 385, 427, 490, 539, 610, 671, 686, 770, 854, 980, 1078, 1220, 1342, 1372, 1540, 1708, 1715, 2135, 2156, 2684, 2695, 2989, 3355, 3430, 3721, 3773, 4270, 4697, 5390, 5978, 6710, 6860, 7442, 7546, 8540, 9394, 10780, 11956, 13420, 14884, 14945, 15092, 18605, 18788, 18865, 20923, 23485, 26047, 29890, 32879, 37210, 37730, 40931, 41846, 46970, 52094, 59780, 65758, 74420, 75460, 81862, 83692, 93940, 104188, 104615, 130235, 131516, 163724, 164395, 182329, 204655, 209230, 230153, 260470, 286517, 328790, 364658, 409310, 418460, 460306, 520940, 573034, 657580, 729316, 818620, 911645, 920612, 1146068, 1150765, 1276303, 1432585, 1823290, 2005619, 2301530, 2552606, 2865170, 3646580, 4011238, 4603060, 5105212, 5730340, 6381515, 8022476, 10028095, 12763030, 14039333, 20056190, 25526060, 28078666, 40112380, 56157332, 70196665, 140393330, 280786660]

約数ペア:

[(1, 280786660), (2, 140393330), (4, 70196665), (5, 56157332), (7, 40112380), (10, 28078666), (11, 25526060), (14, 20056190), (20, 14039333), (22, 12763030), (28, 10028095), (35, 8022476), (44, 6381515), (49, 5730340), (55, 5105212), (61, 4603060), (70, 4011238), (77, 3646580), (98, 2865170), (110, 2552606), (122, 2301530), (140, 2005619), (154, 1823290), (196, 1432585), (220, 1276303), (244, 1150765), (245, 1146068), (305, 920612), (308, 911645), (343, 818620), (385, 729316), (427, 657580), (490, 573034), (539, 520940), (610, 460306), (671, 418460), (686, 409310), (770, 364658), (854, 328790), (980, 286517), (1078, 260470), (1220, 230153), (1342, 209230), (1372, 204655), (1540, 182329), (1708, 164395), (1715, 163724), (2135, 131516), (2156, 130235), (2684, 104615), (2695, 104188), (2989, 93940), (3355, 83692), (3430, 81862), (3721, 75460), (3773, 74420), (4270, 65758), (4697, 59780), (5390, 52094), (5978, 46970), (6710, 41846), (6860, 40931), (7442, 37730), (7546, 37210), (8540, 32879), (9394, 29890), (10780, 26047), (11956, 23485), (13420, 20923), (14884, 18865), (14945, 18788), (15092, 18605)]