21780080

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1$

素因数の和:151

約数の個数: 160

約数和(自身を含む): 64281600

約数和(自身を除く): 42501520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 23, 28, 35, 38, 40, 46, 56, 70, 76, 80, 89, 92, 95, 112, 115, 133, 140, 152, 161, 178, 184, 190, 230, 266, 280, 304, 322, 356, 368, 380, 437, 445, 460, 532, 560, 623, 644, 665, 712, 760, 805, 874, 890, 920, 1064, 1246, 1288, 1330, 1424, 1520, 1610, 1691, 1748, 1780, 1840, 2047, 2128, 2185, 2492, 2576, 2660, 3059, 3115, 3220, 3382, 3496, 3560, 4094, 4370, 4984, 5320, 6118, 6230, 6440, 6764, 6992, 7120, 8188, 8455, 8740, 9968, 10235, 10640, 11837, 12236, 12460, 12880, 13528, 14329, 15295, 16376, 16910, 17480, 20470, 23674, 24472, 24920, 27056, 28658, 30590, 32752, 33820, 34960, 38893, 40940, 47348, 48944, 49840, 57316, 59185, 61180, 67640, 71645, 77786, 81880, 94696, 114632, 118370, 122360, 135280, 143290, 155572, 163760, 189392, 194465, 229264, 236740, 244720, 272251, 286580, 311144, 388930, 473480, 544502, 573160, 622288, 777860, 946960, 1089004, 1146320, 1361255, 1555720, 2178008, 2722510, 3111440, 4356016, 5445020, 10890040, 21780080]

約数ペア:

[(1, 21780080), (2, 10890040), (4, 5445020), (5, 4356016), (7, 3111440), (8, 2722510), (10, 2178008), (14, 1555720), (16, 1361255), (19, 1146320), (20, 1089004), (23, 946960), (28, 777860), (35, 622288), (38, 573160), (40, 544502), (46, 473480), (56, 388930), (70, 311144), (76, 286580), (80, 272251), (89, 244720), (92, 236740), (95, 229264), (112, 194465), (115, 189392), (133, 163760), (140, 155572), (152, 143290), (161, 135280), (178, 122360), (184, 118370), (190, 114632), (230, 94696), (266, 81880), (280, 77786), (304, 71645), (322, 67640), (356, 61180), (368, 59185), (380, 57316), (437, 49840), (445, 48944), (460, 47348), (532, 40940), (560, 38893), (623, 34960), (644, 33820), (665, 32752), (712, 30590), (760, 28658), (805, 27056), (874, 24920), (890, 24472), (920, 23674), (1064, 20470), (1246, 17480), (1288, 16910), (1330, 16376), (1424, 15295), (1520, 14329), (1610, 13528), (1691, 12880), (1748, 12460), (1780, 12236), (1840, 11837), (2047, 10640), (2128, 10235), (2185, 9968), (2492, 8740), (2576, 8455), (2660, 8188), (3059, 7120), (3115, 6992), (3220, 6764), (3382, 6440), (3496, 6230), (3560, 6118), (4094, 5320), (4370, 4984)]