81455920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{167}}^1$

素因数の和:267

約数の個数: 160

約数和(自身を含む): 237984768

約数和(自身を除く): 156528848

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 67, 70, 80, 91, 104, 112, 130, 134, 140, 167, 182, 208, 260, 268, 280, 334, 335, 364, 455, 469, 520, 536, 560, 668, 670, 728, 835, 871, 910, 938, 1040, 1072, 1169, 1336, 1340, 1456, 1670, 1742, 1820, 1876, 2171, 2338, 2345, 2672, 2680, 3340, 3484, 3640, 3752, 4342, 4355, 4676, 4690, 5360, 5845, 6097, 6680, 6968, 7280, 7504, 8684, 8710, 9352, 9380, 10855, 11189, 11690, 12194, 13360, 13936, 15197, 17368, 17420, 18704, 18760, 21710, 22378, 23380, 24388, 30394, 30485, 34736, 34840, 37520, 43420, 44756, 46760, 48776, 55945, 60788, 60970, 69680, 75985, 78323, 86840, 89512, 93520, 97552, 111890, 121576, 121940, 145457, 151970, 156646, 173680, 179024, 223780, 243152, 243880, 290914, 303940, 313292, 391615, 447560, 487760, 581828, 607880, 626584, 727285, 783230, 895120, 1018199, 1163656, 1215760, 1253168, 1454570, 1566460, 2036398, 2327312, 2909140, 3132920, 4072796, 5090995, 5818280, 6265840, 8145592, 10181990, 11636560, 16291184, 20363980, 40727960, 81455920]

約数ペア:

[(1, 81455920), (2, 40727960), (4, 20363980), (5, 16291184), (7, 11636560), (8, 10181990), (10, 8145592), (13, 6265840), (14, 5818280), (16, 5090995), (20, 4072796), (26, 3132920), (28, 2909140), (35, 2327312), (40, 2036398), (52, 1566460), (56, 1454570), (65, 1253168), (67, 1215760), (70, 1163656), (80, 1018199), (91, 895120), (104, 783230), (112, 727285), (130, 626584), (134, 607880), (140, 581828), (167, 487760), (182, 447560), (208, 391615), (260, 313292), (268, 303940), (280, 290914), (334, 243880), (335, 243152), (364, 223780), (455, 179024), (469, 173680), (520, 156646), (536, 151970), (560, 145457), (668, 121940), (670, 121576), (728, 111890), (835, 97552), (871, 93520), (910, 89512), (938, 86840), (1040, 78323), (1072, 75985), (1169, 69680), (1336, 60970), (1340, 60788), (1456, 55945), (1670, 48776), (1742, 46760), (1820, 44756), (1876, 43420), (2171, 37520), (2338, 34840), (2345, 34736), (2672, 30485), (2680, 30394), (3340, 24388), (3484, 23380), (3640, 22378), (3752, 21710), (4342, 18760), (4355, 18704), (4676, 17420), (4690, 17368), (5360, 15197), (5845, 13936), (6097, 13360), (6680, 12194), (6968, 11690), (7280, 11189), (7504, 10855), (8684, 9380), (8710, 9352)]