81777780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1583}}^1$

素因数の和:1646

約数の個数: 144

約数和(自身を含む): 290594304

約数和(自身を除く): 208816524

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 41, 42, 45, 60, 63, 70, 82, 84, 90, 105, 123, 126, 140, 164, 180, 205, 210, 246, 252, 287, 315, 369, 410, 420, 492, 574, 615, 630, 738, 820, 861, 1148, 1230, 1260, 1435, 1476, 1583, 1722, 1845, 2460, 2583, 2870, 3166, 3444, 3690, 4305, 4749, 5166, 5740, 6332, 7380, 7915, 8610, 9498, 10332, 11081, 12915, 14247, 15830, 17220, 18996, 22162, 23745, 25830, 28494, 31660, 33243, 44324, 47490, 51660, 55405, 56988, 64903, 66486, 71235, 94980, 99729, 110810, 129806, 132972, 142470, 166215, 194709, 199458, 221620, 259612, 284940, 324515, 332430, 389418, 398916, 454321, 498645, 584127, 649030, 664860, 778836, 908642, 973545, 997290, 1168254, 1298060, 1362963, 1817284, 1947090, 1994580, 2271605, 2336508, 2725926, 2920635, 3894180, 4088889, 4543210, 5451852, 5841270, 6814815, 8177778, 9086420, 11682540, 13629630, 16355556, 20444445, 27259260, 40888890, 81777780]

約数ペア:

[(1, 81777780), (2, 40888890), (3, 27259260), (4, 20444445), (5, 16355556), (6, 13629630), (7, 11682540), (9, 9086420), (10, 8177778), (12, 6814815), (14, 5841270), (15, 5451852), (18, 4543210), (20, 4088889), (21, 3894180), (28, 2920635), (30, 2725926), (35, 2336508), (36, 2271605), (41, 1994580), (42, 1947090), (45, 1817284), (60, 1362963), (63, 1298060), (70, 1168254), (82, 997290), (84, 973545), (90, 908642), (105, 778836), (123, 664860), (126, 649030), (140, 584127), (164, 498645), (180, 454321), (205, 398916), (210, 389418), (246, 332430), (252, 324515), (287, 284940), (315, 259612), (369, 221620), (410, 199458), (420, 194709), (492, 166215), (574, 142470), (615, 132972), (630, 129806), (738, 110810), (820, 99729), (861, 94980), (1148, 71235), (1230, 66486), (1260, 64903), (1435, 56988), (1476, 55405), (1583, 51660), (1722, 47490), (1845, 44324), (2460, 33243), (2583, 31660), (2870, 28494), (3166, 25830), (3444, 23745), (3690, 22162), (4305, 18996), (4749, 17220), (5166, 15830), (5740, 14247), (6332, 12915), (7380, 11081), (7915, 10332), (8610, 9498)]