394240640

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^2\times {\mathrm{641}}^1$

素因数の和:722

約数の個数: 96

約数和(自身を含む): 975384180

約数和(自身を除く): 581143540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 641, 961, 992, 1240, 1282, 1922, 1984, 2480, 2564, 3205, 3844, 3968, 4805, 4960, 5128, 6410, 7688, 9610, 9920, 10256, 12820, 15376, 19220, 19840, 19871, 20512, 25640, 30752, 38440, 39742, 41024, 51280, 61504, 76880, 79484, 82048, 99355, 102560, 123008, 153760, 158968, 198710, 205120, 307520, 317936, 397420, 410240, 615040, 616001, 635872, 794840, 1232002, 1271744, 1589680, 2464004, 2543488, 3080005, 3179360, 4928008, 6160010, 6358720, 9856016, 12320020, 12717440, 19712032, 24640040, 39424064, 49280080, 78848128, 98560160, 197120320, 394240640]

約数ペア:

[(1, 394240640), (2, 197120320), (4, 98560160), (5, 78848128), (8, 49280080), (10, 39424064), (16, 24640040), (20, 19712032), (31, 12717440), (32, 12320020), (40, 9856016), (62, 6358720), (64, 6160010), (80, 4928008), (124, 3179360), (128, 3080005), (155, 2543488), (160, 2464004), (248, 1589680), (310, 1271744), (320, 1232002), (496, 794840), (620, 635872), (640, 616001), (641, 615040), (961, 410240), (992, 397420), (1240, 317936), (1282, 307520), (1922, 205120), (1984, 198710), (2480, 158968), (2564, 153760), (3205, 123008), (3844, 102560), (3968, 99355), (4805, 82048), (4960, 79484), (5128, 76880), (6410, 61504), (7688, 51280), (9610, 41024), (9920, 39742), (10256, 38440), (12820, 30752), (15376, 25640), (19220, 20512), (19840, 19871)]