81578240

素因数分解:

$2^8\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{163}}^1$

素因数の和:224

約数の個数: 144

約数和(自身を含む): 217219968

約数和(自身を除く): 135641728

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 23, 32, 34, 40, 46, 64, 68, 80, 85, 92, 115, 128, 136, 160, 163, 170, 184, 230, 256, 272, 320, 326, 340, 368, 391, 460, 544, 640, 652, 680, 736, 782, 815, 920, 1088, 1280, 1304, 1360, 1472, 1564, 1630, 1840, 1955, 2176, 2608, 2720, 2771, 2944, 3128, 3260, 3680, 3749, 3910, 4352, 5216, 5440, 5542, 5888, 6256, 6520, 7360, 7498, 7820, 10432, 10880, 11084, 12512, 13040, 13855, 14720, 14996, 15640, 18745, 20864, 21760, 22168, 25024, 26080, 27710, 29440, 29992, 31280, 37490, 41728, 44336, 50048, 52160, 55420, 59984, 62560, 63733, 74980, 88672, 100096, 104320, 110840, 119968, 125120, 127466, 149960, 177344, 208640, 221680, 239936, 250240, 254932, 299920, 318665, 354688, 443360, 479872, 500480, 509864, 599840, 637330, 709376, 886720, 959744, 1019728, 1199680, 1274660, 1773440, 2039456, 2399360, 2549320, 3546880, 4078912, 4798720, 5098640, 8157824, 10197280, 16315648, 20394560, 40789120, 81578240]

約数ペア:

[(1, 81578240), (2, 40789120), (4, 20394560), (5, 16315648), (8, 10197280), (10, 8157824), (16, 5098640), (17, 4798720), (20, 4078912), (23, 3546880), (32, 2549320), (34, 2399360), (40, 2039456), (46, 1773440), (64, 1274660), (68, 1199680), (80, 1019728), (85, 959744), (92, 886720), (115, 709376), (128, 637330), (136, 599840), (160, 509864), (163, 500480), (170, 479872), (184, 443360), (230, 354688), (256, 318665), (272, 299920), (320, 254932), (326, 250240), (340, 239936), (368, 221680), (391, 208640), (460, 177344), (544, 149960), (640, 127466), (652, 125120), (680, 119968), (736, 110840), (782, 104320), (815, 100096), (920, 88672), (1088, 74980), (1280, 63733), (1304, 62560), (1360, 59984), (1472, 55420), (1564, 52160), (1630, 50048), (1840, 44336), (1955, 41728), (2176, 37490), (2608, 31280), (2720, 29992), (2771, 29440), (2944, 27710), (3128, 26080), (3260, 25024), (3680, 22168), (3749, 21760), (3910, 20864), (4352, 18745), (5216, 15640), (5440, 14996), (5542, 14720), (5888, 13855), (6256, 13040), (6520, 12512), (7360, 11084), (7498, 10880), (7820, 10432)]