20711520

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{757}}^1$

素因数の和:797

約数の個数: 144

約数和(自身を含む): 74496240

約数和(自身を除く): 53784720

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 19, 20, 24, 30, 32, 36, 38, 40, 45, 48, 57, 60, 72, 76, 80, 90, 95, 96, 114, 120, 144, 152, 160, 171, 180, 190, 228, 240, 285, 288, 304, 342, 360, 380, 456, 480, 570, 608, 684, 720, 757, 760, 855, 912, 1140, 1368, 1440, 1514, 1520, 1710, 1824, 2271, 2280, 2736, 3028, 3040, 3420, 3785, 4542, 4560, 5472, 6056, 6813, 6840, 7570, 9084, 9120, 11355, 12112, 13626, 13680, 14383, 15140, 18168, 22710, 24224, 27252, 27360, 28766, 30280, 34065, 36336, 43149, 45420, 54504, 57532, 60560, 68130, 71915, 72672, 86298, 90840, 109008, 115064, 121120, 129447, 136260, 143830, 172596, 181680, 215745, 218016, 230128, 258894, 272520, 287660, 345192, 363360, 431490, 460256, 517788, 545040, 575320, 647235, 690384, 862980, 1035576, 1090080, 1150640, 1294470, 1380768, 1725960, 2071152, 2301280, 2588940, 3451920, 4142304, 5177880, 6903840, 10355760, 20711520]

約数ペア:

[(1, 20711520), (2, 10355760), (3, 6903840), (4, 5177880), (5, 4142304), (6, 3451920), (8, 2588940), (9, 2301280), (10, 2071152), (12, 1725960), (15, 1380768), (16, 1294470), (18, 1150640), (19, 1090080), (20, 1035576), (24, 862980), (30, 690384), (32, 647235), (36, 575320), (38, 545040), (40, 517788), (45, 460256), (48, 431490), (57, 363360), (60, 345192), (72, 287660), (76, 272520), (80, 258894), (90, 230128), (95, 218016), (96, 215745), (114, 181680), (120, 172596), (144, 143830), (152, 136260), (160, 129447), (171, 121120), (180, 115064), (190, 109008), (228, 90840), (240, 86298), (285, 72672), (288, 71915), (304, 68130), (342, 60560), (360, 57532), (380, 54504), (456, 45420), (480, 43149), (570, 36336), (608, 34065), (684, 30280), (720, 28766), (757, 27360), (760, 27252), (855, 24224), (912, 22710), (1140, 18168), (1368, 15140), (1440, 14383), (1514, 13680), (1520, 13626), (1710, 12112), (1824, 11355), (2271, 9120), (2280, 9084), (2736, 7570), (3028, 6840), (3040, 6813), (3420, 6056), (3785, 5472), (4542, 4560)]