256355840

素因数分解:

$2^9\times 5^1\times {\mathrm{13}}^1\times {\mathrm{7703}}^1$

素因数の和:7739

約数の個数: 80

約数和(自身を含む): 662020128

約数和(自身を除く): 405664288

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 512, 520, 640, 832, 1040, 1280, 1664, 2080, 2560, 3328, 4160, 6656, 7703, 8320, 15406, 16640, 30812, 33280, 38515, 61624, 77030, 100139, 123248, 154060, 200278, 246496, 308120, 400556, 492992, 500695, 616240, 801112, 985984, 1001390, 1232480, 1602224, 1971968, 2002780, 2464960, 3204448, 3943936, 4005560, 4929920, 6408896, 8011120, 9859840, 12817792, 16022240, 19719680, 25635584, 32044480, 51271168, 64088960, 128177920, 256355840]

約数ペア:

[(1, 256355840), (2, 128177920), (4, 64088960), (5, 51271168), (8, 32044480), (10, 25635584), (13, 19719680), (16, 16022240), (20, 12817792), (26, 9859840), (32, 8011120), (40, 6408896), (52, 4929920), (64, 4005560), (65, 3943936), (80, 3204448), (104, 2464960), (128, 2002780), (130, 1971968), (160, 1602224), (208, 1232480), (256, 1001390), (260, 985984), (320, 801112), (416, 616240), (512, 500695), (520, 492992), (640, 400556), (832, 308120), (1040, 246496), (1280, 200278), (1664, 154060), (2080, 123248), (2560, 100139), (3328, 77030), (4160, 61624), (6656, 38515), (7703, 33280), (8320, 30812), (15406, 16640)]