257631920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{823}}^1$

素因数の和:899

約数の個数: 160

約数和(自身を含む): 755284992

約数和(自身を除く): 497653072

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 43, 52, 56, 65, 70, 80, 86, 91, 104, 112, 130, 140, 172, 182, 208, 215, 260, 280, 301, 344, 364, 430, 455, 520, 559, 560, 602, 688, 728, 823, 860, 910, 1040, 1118, 1204, 1456, 1505, 1646, 1720, 1820, 2236, 2408, 2795, 3010, 3292, 3440, 3640, 3913, 4115, 4472, 4816, 5590, 5761, 6020, 6584, 7280, 7826, 8230, 8944, 10699, 11180, 11522, 12040, 13168, 15652, 16460, 19565, 21398, 22360, 23044, 24080, 28805, 31304, 32920, 35389, 39130, 42796, 44720, 46088, 53495, 57610, 62608, 65840, 70778, 74893, 78260, 85592, 92176, 106990, 115220, 141556, 149786, 156520, 171184, 176945, 213980, 230440, 247723, 283112, 299572, 313040, 353890, 374465, 427960, 460057, 460880, 495446, 566224, 599144, 707780, 748930, 855920, 920114, 990892, 1198288, 1238615, 1415560, 1497860, 1840228, 1981784, 2300285, 2477230, 2831120, 2995720, 3220399, 3680456, 3963568, 4600570, 4954460, 5991440, 6440798, 7360912, 9201140, 9908920, 12881596, 16101995, 18402280, 19817840, 25763192, 32203990, 36804560, 51526384, 64407980, 128815960, 257631920]

約数ペア:

[(1, 257631920), (2, 128815960), (4, 64407980), (5, 51526384), (7, 36804560), (8, 32203990), (10, 25763192), (13, 19817840), (14, 18402280), (16, 16101995), (20, 12881596), (26, 9908920), (28, 9201140), (35, 7360912), (40, 6440798), (43, 5991440), (52, 4954460), (56, 4600570), (65, 3963568), (70, 3680456), (80, 3220399), (86, 2995720), (91, 2831120), (104, 2477230), (112, 2300285), (130, 1981784), (140, 1840228), (172, 1497860), (182, 1415560), (208, 1238615), (215, 1198288), (260, 990892), (280, 920114), (301, 855920), (344, 748930), (364, 707780), (430, 599144), (455, 566224), (520, 495446), (559, 460880), (560, 460057), (602, 427960), (688, 374465), (728, 353890), (823, 313040), (860, 299572), (910, 283112), (1040, 247723), (1118, 230440), (1204, 213980), (1456, 176945), (1505, 171184), (1646, 156520), (1720, 149786), (1820, 141556), (2236, 115220), (2408, 106990), (2795, 92176), (3010, 85592), (3292, 78260), (3440, 74893), (3640, 70778), (3913, 65840), (4115, 62608), (4472, 57610), (4816, 53495), (5590, 46088), (5761, 44720), (6020, 42796), (6584, 39130), (7280, 35389), (7826, 32920), (8230, 31304), (8944, 28805), (10699, 24080), (11180, 23044), (11522, 22360), (12040, 21398), (13168, 19565), (15652, 16460)]