2561940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{331}}^1$

素因数の和:389

約数の個数: 72

約数和(自身を含む): 7975968

約数和(自身を除く): 5414028

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 43, 45, 60, 86, 90, 129, 172, 180, 215, 258, 331, 387, 430, 516, 645, 662, 774, 860, 993, 1290, 1324, 1548, 1655, 1935, 1986, 2580, 2979, 3310, 3870, 3972, 4965, 5958, 6620, 7740, 9930, 11916, 14233, 14895, 19860, 28466, 29790, 42699, 56932, 59580, 71165, 85398, 128097, 142330, 170796, 213495, 256194, 284660, 426990, 512388, 640485, 853980, 1280970, 2561940]

約数ペア:

[(1, 2561940), (2, 1280970), (3, 853980), (4, 640485), (5, 512388), (6, 426990), (9, 284660), (10, 256194), (12, 213495), (15, 170796), (18, 142330), (20, 128097), (30, 85398), (36, 71165), (43, 59580), (45, 56932), (60, 42699), (86, 29790), (90, 28466), (129, 19860), (172, 14895), (180, 14233), (215, 11916), (258, 9930), (331, 7740), (387, 6620), (430, 5958), (516, 4965), (645, 3972), (662, 3870), (774, 3310), (860, 2979), (993, 2580), (1290, 1986), (1324, 1935), (1548, 1655)]