21005808

素因数分解:

$2^4\times 3^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{359}}^1$

素因数の和:446

約数の個数: 80

約数和(自身を含む): 57853440

約数和(自身を除く): 36847632

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 23, 24, 46, 48, 53, 69, 92, 106, 138, 159, 184, 212, 276, 318, 359, 368, 424, 552, 636, 718, 848, 1077, 1104, 1219, 1272, 1436, 2154, 2438, 2544, 2872, 3657, 4308, 4876, 5744, 7314, 8257, 8616, 9752, 14628, 16514, 17232, 19027, 19504, 24771, 29256, 33028, 38054, 49542, 57081, 58512, 66056, 76108, 99084, 114162, 132112, 152216, 198168, 228324, 304432, 396336, 437621, 456648, 875242, 913296, 1312863, 1750484, 2625726, 3500968, 5251452, 7001936, 10502904, 21005808]

約数ペア:

[(1, 21005808), (2, 10502904), (3, 7001936), (4, 5251452), (6, 3500968), (8, 2625726), (12, 1750484), (16, 1312863), (23, 913296), (24, 875242), (46, 456648), (48, 437621), (53, 396336), (69, 304432), (92, 228324), (106, 198168), (138, 152216), (159, 132112), (184, 114162), (212, 99084), (276, 76108), (318, 66056), (359, 58512), (368, 57081), (424, 49542), (552, 38054), (636, 33028), (718, 29256), (848, 24771), (1077, 19504), (1104, 19027), (1219, 17232), (1272, 16514), (1436, 14628), (2154, 9752), (2438, 8616), (2544, 8257), (2872, 7314), (3657, 5744), (4308, 4876)]