256528480

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{179}}^1$

素因数の和:273

約数の個数: 144

約数和(自身を含む): 672371280

約数和(自身を除く): 415842800

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 53, 65, 80, 104, 106, 130, 160, 169, 179, 208, 212, 260, 265, 338, 358, 416, 424, 520, 530, 676, 689, 716, 845, 848, 895, 1040, 1060, 1352, 1378, 1432, 1690, 1696, 1790, 2080, 2120, 2327, 2704, 2756, 2864, 3380, 3445, 3580, 4240, 4654, 5408, 5512, 5728, 6760, 6890, 7160, 8480, 8957, 9308, 9487, 11024, 11635, 13520, 13780, 14320, 17914, 18616, 18974, 22048, 23270, 27040, 27560, 28640, 30251, 35828, 37232, 37948, 44785, 46540, 47435, 55120, 60502, 71656, 74464, 75896, 89570, 93080, 94870, 110240, 121004, 123331, 143312, 151255, 151792, 179140, 186160, 189740, 242008, 246662, 286624, 302510, 303584, 358280, 372320, 379480, 484016, 493324, 605020, 616655, 716560, 758960, 968032, 986648, 1210040, 1233310, 1433120, 1517920, 1603303, 1973296, 2420080, 2466620, 3206606, 3946592, 4840160, 4933240, 6413212, 8016515, 9866480, 12826424, 16033030, 19732960, 25652848, 32066060, 51305696, 64132120, 128264240, 256528480]

約数ペア:

[(1, 256528480), (2, 128264240), (4, 64132120), (5, 51305696), (8, 32066060), (10, 25652848), (13, 19732960), (16, 16033030), (20, 12826424), (26, 9866480), (32, 8016515), (40, 6413212), (52, 4933240), (53, 4840160), (65, 3946592), (80, 3206606), (104, 2466620), (106, 2420080), (130, 1973296), (160, 1603303), (169, 1517920), (179, 1433120), (208, 1233310), (212, 1210040), (260, 986648), (265, 968032), (338, 758960), (358, 716560), (416, 616655), (424, 605020), (520, 493324), (530, 484016), (676, 379480), (689, 372320), (716, 358280), (845, 303584), (848, 302510), (895, 286624), (1040, 246662), (1060, 242008), (1352, 189740), (1378, 186160), (1432, 179140), (1690, 151792), (1696, 151255), (1790, 143312), (2080, 123331), (2120, 121004), (2327, 110240), (2704, 94870), (2756, 93080), (2864, 89570), (3380, 75896), (3445, 74464), (3580, 71656), (4240, 60502), (4654, 55120), (5408, 47435), (5512, 46540), (5728, 44785), (6760, 37948), (6890, 37232), (7160, 35828), (8480, 30251), (8957, 28640), (9308, 27560), (9487, 27040), (11024, 23270), (11635, 22048), (13520, 18974), (13780, 18616), (14320, 17914)]