31878540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{197}}^1$

素因数の和:272

約数の個数: 144

約数和(自身を含む): 103783680

約数和(自身を除く): 71905140

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 31, 36, 45, 58, 60, 62, 87, 90, 93, 116, 124, 145, 155, 174, 180, 186, 197, 261, 279, 290, 310, 348, 372, 394, 435, 465, 522, 558, 580, 591, 620, 788, 870, 899, 930, 985, 1044, 1116, 1182, 1305, 1395, 1740, 1773, 1798, 1860, 1970, 2364, 2610, 2697, 2790, 2955, 3546, 3596, 3940, 4495, 5220, 5394, 5580, 5713, 5910, 6107, 7092, 8091, 8865, 8990, 10788, 11426, 11820, 12214, 13485, 16182, 17139, 17730, 17980, 18321, 22852, 24428, 26970, 28565, 30535, 32364, 34278, 35460, 36642, 40455, 51417, 53940, 54963, 57130, 61070, 68556, 73284, 80910, 85695, 91605, 102834, 109926, 114260, 122140, 161820, 171390, 177103, 183210, 205668, 219852, 257085, 274815, 342780, 354206, 366420, 514170, 531309, 549630, 708412, 885515, 1028340, 1062618, 1099260, 1593927, 1771030, 2125236, 2656545, 3187854, 3542060, 5313090, 6375708, 7969635, 10626180, 15939270, 31878540]

約数ペア:

[(1, 31878540), (2, 15939270), (3, 10626180), (4, 7969635), (5, 6375708), (6, 5313090), (9, 3542060), (10, 3187854), (12, 2656545), (15, 2125236), (18, 1771030), (20, 1593927), (29, 1099260), (30, 1062618), (31, 1028340), (36, 885515), (45, 708412), (58, 549630), (60, 531309), (62, 514170), (87, 366420), (90, 354206), (93, 342780), (116, 274815), (124, 257085), (145, 219852), (155, 205668), (174, 183210), (180, 177103), (186, 171390), (197, 161820), (261, 122140), (279, 114260), (290, 109926), (310, 102834), (348, 91605), (372, 85695), (394, 80910), (435, 73284), (465, 68556), (522, 61070), (558, 57130), (580, 54963), (591, 53940), (620, 51417), (788, 40455), (870, 36642), (899, 35460), (930, 34278), (985, 32364), (1044, 30535), (1116, 28565), (1182, 26970), (1305, 24428), (1395, 22852), (1740, 18321), (1773, 17980), (1798, 17730), (1860, 17139), (1970, 16182), (2364, 13485), (2610, 12214), (2697, 11820), (2790, 11426), (2955, 10788), (3546, 8990), (3596, 8865), (3940, 8091), (4495, 7092), (5220, 6107), (5394, 5910), (5580, 5713)]