81556560

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{227}}^1\times {\mathrm{499}}^1$

素因数の和:745

約数の個数: 120

約数和(自身を含む): 275652000

約数和(自身を除く): 194095440

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 227, 240, 360, 454, 499, 681, 720, 908, 998, 1135, 1362, 1497, 1816, 1996, 2043, 2270, 2495, 2724, 2994, 3405, 3632, 3992, 4086, 4491, 4540, 4990, 5448, 5988, 6810, 7485, 7984, 8172, 8982, 9080, 9980, 10215, 10896, 11976, 13620, 14970, 16344, 17964, 18160, 19960, 20430, 22455, 23952, 27240, 29940, 32688, 35928, 39920, 40860, 44910, 54480, 59880, 71856, 81720, 89820, 113273, 119760, 163440, 179640, 226546, 339819, 359280, 453092, 566365, 679638, 906184, 1019457, 1132730, 1359276, 1699095, 1812368, 2038914, 2265460, 2718552, 3398190, 4077828, 4530920, 5097285, 5437104, 6796380, 8155656, 9061840, 10194570, 13592760, 16311312, 20389140, 27185520, 40778280, 81556560]

約数ペア:

[(1, 81556560), (2, 40778280), (3, 27185520), (4, 20389140), (5, 16311312), (6, 13592760), (8, 10194570), (9, 9061840), (10, 8155656), (12, 6796380), (15, 5437104), (16, 5097285), (18, 4530920), (20, 4077828), (24, 3398190), (30, 2718552), (36, 2265460), (40, 2038914), (45, 1812368), (48, 1699095), (60, 1359276), (72, 1132730), (80, 1019457), (90, 906184), (120, 679638), (144, 566365), (180, 453092), (227, 359280), (240, 339819), (360, 226546), (454, 179640), (499, 163440), (681, 119760), (720, 113273), (908, 89820), (998, 81720), (1135, 71856), (1362, 59880), (1497, 54480), (1816, 44910), (1996, 40860), (2043, 39920), (2270, 35928), (2495, 32688), (2724, 29940), (2994, 27240), (3405, 23952), (3632, 22455), (3992, 20430), (4086, 19960), (4491, 18160), (4540, 17964), (4990, 16344), (5448, 14970), (5988, 13620), (6810, 11976), (7485, 10896), (7984, 10215), (8172, 9980), (8982, 9080)]