81394880

素因数分解:

$2^6\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{179}}^1$

素因数の和:239

約数の個数: 168

約数和(自身を含む): 234543600

約数和(自身を除く): 153148720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 29, 32, 35, 40, 49, 56, 58, 64, 70, 80, 98, 112, 116, 140, 145, 160, 179, 196, 203, 224, 232, 245, 280, 290, 320, 358, 392, 406, 448, 464, 490, 560, 580, 716, 784, 812, 895, 928, 980, 1015, 1120, 1160, 1253, 1421, 1432, 1568, 1624, 1790, 1856, 1960, 2030, 2240, 2320, 2506, 2842, 2864, 3136, 3248, 3580, 3920, 4060, 4640, 5012, 5191, 5684, 5728, 6265, 6496, 7105, 7160, 7840, 8120, 8771, 9280, 10024, 10382, 11368, 11456, 12530, 12992, 14210, 14320, 15680, 16240, 17542, 20048, 20764, 22736, 25060, 25955, 28420, 28640, 32480, 35084, 36337, 40096, 41528, 43855, 45472, 50120, 51910, 56840, 57280, 64960, 70168, 72674, 80192, 83056, 87710, 90944, 100240, 103820, 113680, 140336, 145348, 166112, 175420, 181685, 200480, 207640, 227360, 254359, 280672, 290696, 332224, 350840, 363370, 400960, 415280, 454720, 508718, 561344, 581392, 701680, 726740, 830560, 1017436, 1162784, 1271795, 1403360, 1453480, 1661120, 2034872, 2325568, 2543590, 2806720, 2906960, 4069744, 5087180, 5813920, 8139488, 10174360, 11627840, 16278976, 20348720, 40697440, 81394880]

約数ペア:

[(1, 81394880), (2, 40697440), (4, 20348720), (5, 16278976), (7, 11627840), (8, 10174360), (10, 8139488), (14, 5813920), (16, 5087180), (20, 4069744), (28, 2906960), (29, 2806720), (32, 2543590), (35, 2325568), (40, 2034872), (49, 1661120), (56, 1453480), (58, 1403360), (64, 1271795), (70, 1162784), (80, 1017436), (98, 830560), (112, 726740), (116, 701680), (140, 581392), (145, 561344), (160, 508718), (179, 454720), (196, 415280), (203, 400960), (224, 363370), (232, 350840), (245, 332224), (280, 290696), (290, 280672), (320, 254359), (358, 227360), (392, 207640), (406, 200480), (448, 181685), (464, 175420), (490, 166112), (560, 145348), (580, 140336), (716, 113680), (784, 103820), (812, 100240), (895, 90944), (928, 87710), (980, 83056), (1015, 80192), (1120, 72674), (1160, 70168), (1253, 64960), (1421, 57280), (1432, 56840), (1568, 51910), (1624, 50120), (1790, 45472), (1856, 43855), (1960, 41528), (2030, 40096), (2240, 36337), (2320, 35084), (2506, 32480), (2842, 28640), (2864, 28420), (3136, 25955), (3248, 25060), (3580, 22736), (3920, 20764), (4060, 20048), (4640, 17542), (5012, 16240), (5191, 15680), (5684, 14320), (5728, 14210), (6265, 12992), (6496, 12530), (7105, 11456), (7160, 11368), (7840, 10382), (8120, 10024), (8771, 9280)]