20991456

素因数分解:

$2^5\times 3^2\times {\mathrm{23}}^1\times {\mathrm{3169}}^1$

素因数の和:3208

約数の個数: 72

約数和(自身を含む): 62309520

約数和(自身を除く): 41318064

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 23, 24, 32, 36, 46, 48, 69, 72, 92, 96, 138, 144, 184, 207, 276, 288, 368, 414, 552, 736, 828, 1104, 1656, 2208, 3169, 3312, 6338, 6624, 9507, 12676, 19014, 25352, 28521, 38028, 50704, 57042, 72887, 76056, 101408, 114084, 145774, 152112, 218661, 228168, 291548, 304224, 437322, 456336, 583096, 655983, 874644, 912672, 1166192, 1311966, 1749288, 2332384, 2623932, 3498576, 5247864, 6997152, 10495728, 20991456]

約数ペア:

[(1, 20991456), (2, 10495728), (3, 6997152), (4, 5247864), (6, 3498576), (8, 2623932), (9, 2332384), (12, 1749288), (16, 1311966), (18, 1166192), (23, 912672), (24, 874644), (32, 655983), (36, 583096), (46, 456336), (48, 437322), (69, 304224), (72, 291548), (92, 228168), (96, 218661), (138, 152112), (144, 145774), (184, 114084), (207, 101408), (276, 76056), (288, 72887), (368, 57042), (414, 50704), (552, 38028), (736, 28521), (828, 25352), (1104, 19014), (1656, 12676), (2208, 9507), (3169, 6624), (3312, 6338)]