251421940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{281}}^1$

素因数の和:398

約数の個数: 144

約数和(自身を含む): 680508864

約数和(自身を除く): 429086924

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 77, 83, 98, 110, 140, 154, 166, 196, 220, 245, 281, 308, 332, 385, 415, 490, 539, 562, 581, 770, 830, 913, 980, 1078, 1124, 1162, 1405, 1540, 1660, 1826, 1967, 2156, 2324, 2695, 2810, 2905, 3091, 3652, 3934, 4067, 4565, 5390, 5620, 5810, 6182, 6391, 7868, 8134, 9130, 9835, 10780, 11620, 12364, 12782, 13769, 15455, 16268, 18260, 19670, 20335, 21637, 23323, 25564, 27538, 30910, 31955, 39340, 40670, 43274, 44737, 46646, 55076, 61820, 63910, 68845, 81340, 86548, 89474, 93292, 108185, 116615, 127820, 137690, 151459, 163261, 178948, 216370, 223685, 233230, 256553, 275380, 302918, 326522, 432740, 447370, 466460, 513106, 605836, 653044, 757295, 816305, 894740, 1026212, 1142827, 1282765, 1514590, 1632610, 1795871, 2285654, 2565530, 3029180, 3265220, 3591742, 4571308, 5131060, 5714135, 7183484, 8979355, 11428270, 12571097, 17958710, 22856540, 25142194, 35917420, 50284388, 62855485, 125710970, 251421940]

約数ペア:

[(1, 251421940), (2, 125710970), (4, 62855485), (5, 50284388), (7, 35917420), (10, 25142194), (11, 22856540), (14, 17958710), (20, 12571097), (22, 11428270), (28, 8979355), (35, 7183484), (44, 5714135), (49, 5131060), (55, 4571308), (70, 3591742), (77, 3265220), (83, 3029180), (98, 2565530), (110, 2285654), (140, 1795871), (154, 1632610), (166, 1514590), (196, 1282765), (220, 1142827), (245, 1026212), (281, 894740), (308, 816305), (332, 757295), (385, 653044), (415, 605836), (490, 513106), (539, 466460), (562, 447370), (581, 432740), (770, 326522), (830, 302918), (913, 275380), (980, 256553), (1078, 233230), (1124, 223685), (1162, 216370), (1405, 178948), (1540, 163261), (1660, 151459), (1826, 137690), (1967, 127820), (2156, 116615), (2324, 108185), (2695, 93292), (2810, 89474), (2905, 86548), (3091, 81340), (3652, 68845), (3934, 63910), (4067, 61820), (4565, 55076), (5390, 46646), (5620, 44737), (5810, 43274), (6182, 40670), (6391, 39340), (7868, 31955), (8134, 30910), (9130, 27538), (9835, 25564), (10780, 23323), (11620, 21637), (12364, 20335), (12782, 19670), (13769, 18260), (15455, 16268)]