280842640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{281}}^1$

素因数の和:369

約数の個数: 120

約数和(自身を含む): 729187704

約数和(自身を除く): 448345064

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 281, 310, 403, 496, 520, 562, 620, 806, 961, 1040, 1124, 1240, 1405, 1612, 1922, 2015, 2248, 2480, 2810, 3224, 3653, 3844, 4030, 4496, 4805, 5620, 6448, 7306, 7688, 8060, 8711, 9610, 11240, 12493, 14612, 15376, 16120, 17422, 18265, 19220, 22480, 24986, 29224, 32240, 34844, 36530, 38440, 43555, 49972, 58448, 62465, 69688, 73060, 76880, 87110, 99944, 113243, 124930, 139376, 146120, 174220, 199888, 226486, 249860, 270041, 292240, 348440, 452972, 499720, 540082, 566215, 696880, 905944, 999440, 1080164, 1132430, 1350205, 1811888, 2160328, 2264860, 2700410, 3510533, 4320656, 4529720, 5400820, 7021066, 9059440, 10801640, 14042132, 17552665, 21603280, 28084264, 35105330, 56168528, 70210660, 140421320, 280842640]

約数ペア:

[(1, 280842640), (2, 140421320), (4, 70210660), (5, 56168528), (8, 35105330), (10, 28084264), (13, 21603280), (16, 17552665), (20, 14042132), (26, 10801640), (31, 9059440), (40, 7021066), (52, 5400820), (62, 4529720), (65, 4320656), (80, 3510533), (104, 2700410), (124, 2264860), (130, 2160328), (155, 1811888), (208, 1350205), (248, 1132430), (260, 1080164), (281, 999440), (310, 905944), (403, 696880), (496, 566215), (520, 540082), (562, 499720), (620, 452972), (806, 348440), (961, 292240), (1040, 270041), (1124, 249860), (1240, 226486), (1405, 199888), (1612, 174220), (1922, 146120), (2015, 139376), (2248, 124930), (2480, 113243), (2810, 99944), (3224, 87110), (3653, 76880), (3844, 73060), (4030, 69688), (4496, 62465), (4805, 58448), (5620, 49972), (6448, 43555), (7306, 38440), (7688, 36530), (8060, 34844), (8711, 32240), (9610, 29224), (11240, 24986), (12493, 22480), (14612, 19220), (15376, 18265), (16120, 17422)]