257240480

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{31}}^2\times {\mathrm{239}}^1$

素因数の和:323

約数の個数: 144

約数和(自身を含む): 720679680

約数和(自身を除く): 463439200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 56, 62, 70, 80, 112, 124, 140, 155, 160, 217, 224, 239, 248, 280, 310, 434, 478, 496, 560, 620, 868, 956, 961, 992, 1085, 1120, 1195, 1240, 1673, 1736, 1912, 1922, 2170, 2390, 2480, 3346, 3472, 3824, 3844, 4340, 4780, 4805, 4960, 6692, 6727, 6944, 7409, 7648, 7688, 8365, 8680, 9560, 9610, 13384, 13454, 14818, 15376, 16730, 17360, 19120, 19220, 26768, 26908, 29636, 30752, 33460, 33635, 34720, 37045, 38240, 38440, 51863, 53536, 53816, 59272, 66920, 67270, 74090, 76880, 103726, 107632, 118544, 133840, 134540, 148180, 153760, 207452, 215264, 229679, 237088, 259315, 267680, 269080, 296360, 414904, 459358, 518630, 538160, 592720, 829808, 918716, 1037260, 1076320, 1148395, 1185440, 1607753, 1659616, 1837432, 2074520, 2296790, 3215506, 3674864, 4149040, 4593580, 6431012, 7349728, 8038765, 8298080, 9187160, 12862024, 16077530, 18374320, 25724048, 32155060, 36748640, 51448096, 64310120, 128620240, 257240480]

約数ペア:

[(1, 257240480), (2, 128620240), (4, 64310120), (5, 51448096), (7, 36748640), (8, 32155060), (10, 25724048), (14, 18374320), (16, 16077530), (20, 12862024), (28, 9187160), (31, 8298080), (32, 8038765), (35, 7349728), (40, 6431012), (56, 4593580), (62, 4149040), (70, 3674864), (80, 3215506), (112, 2296790), (124, 2074520), (140, 1837432), (155, 1659616), (160, 1607753), (217, 1185440), (224, 1148395), (239, 1076320), (248, 1037260), (280, 918716), (310, 829808), (434, 592720), (478, 538160), (496, 518630), (560, 459358), (620, 414904), (868, 296360), (956, 269080), (961, 267680), (992, 259315), (1085, 237088), (1120, 229679), (1195, 215264), (1240, 207452), (1673, 153760), (1736, 148180), (1912, 134540), (1922, 133840), (2170, 118544), (2390, 107632), (2480, 103726), (3346, 76880), (3472, 74090), (3824, 67270), (3844, 66920), (4340, 59272), (4780, 53816), (4805, 53536), (4960, 51863), (6692, 38440), (6727, 38240), (6944, 37045), (7409, 34720), (7648, 33635), (7688, 33460), (8365, 30752), (8680, 29636), (9560, 26908), (9610, 26768), (13384, 19220), (13454, 19120), (14818, 17360), (15376, 16730)]