128961280

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{389}}^1$

素因数の和:454

約数の個数: 144

約数和(自身を含む): 363504960

約数和(自身を除く): 234543680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 37, 40, 56, 64, 70, 74, 80, 112, 128, 140, 148, 160, 185, 224, 256, 259, 280, 296, 320, 370, 389, 448, 518, 560, 592, 640, 740, 778, 896, 1036, 1120, 1184, 1280, 1295, 1480, 1556, 1792, 1945, 2072, 2240, 2368, 2590, 2723, 2960, 3112, 3890, 4144, 4480, 4736, 5180, 5446, 5920, 6224, 7780, 8288, 8960, 9472, 10360, 10892, 11840, 12448, 13615, 14393, 15560, 16576, 20720, 21784, 23680, 24896, 27230, 28786, 31120, 33152, 41440, 43568, 47360, 49792, 54460, 57572, 62240, 66304, 71965, 82880, 87136, 99584, 100751, 108920, 115144, 124480, 143930, 165760, 174272, 201502, 217840, 230288, 248960, 287860, 331520, 348544, 403004, 435680, 460576, 497920, 503755, 575720, 697088, 806008, 871360, 921152, 1007510, 1151440, 1612016, 1742720, 1842304, 2015020, 2302880, 3224032, 3485440, 3684608, 4030040, 4605760, 6448064, 8060080, 9211520, 12896128, 16120160, 18423040, 25792256, 32240320, 64480640, 128961280]

約数ペア:

[(1, 128961280), (2, 64480640), (4, 32240320), (5, 25792256), (7, 18423040), (8, 16120160), (10, 12896128), (14, 9211520), (16, 8060080), (20, 6448064), (28, 4605760), (32, 4030040), (35, 3684608), (37, 3485440), (40, 3224032), (56, 2302880), (64, 2015020), (70, 1842304), (74, 1742720), (80, 1612016), (112, 1151440), (128, 1007510), (140, 921152), (148, 871360), (160, 806008), (185, 697088), (224, 575720), (256, 503755), (259, 497920), (280, 460576), (296, 435680), (320, 403004), (370, 348544), (389, 331520), (448, 287860), (518, 248960), (560, 230288), (592, 217840), (640, 201502), (740, 174272), (778, 165760), (896, 143930), (1036, 124480), (1120, 115144), (1184, 108920), (1280, 100751), (1295, 99584), (1480, 87136), (1556, 82880), (1792, 71965), (1945, 66304), (2072, 62240), (2240, 57572), (2368, 54460), (2590, 49792), (2723, 47360), (2960, 43568), (3112, 41440), (3890, 33152), (4144, 31120), (4480, 28786), (4736, 27230), (5180, 24896), (5446, 23680), (5920, 21784), (6224, 20720), (7780, 16576), (8288, 15560), (8960, 14393), (9472, 13615), (10360, 12448), (10892, 11840)]