20999872

素因数分解:

$2^6\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{151}}^1$

素因数の和:257

約数の個数: 56

約数和(自身を含む): 43781472

約数和(自身を除く): 22781600

約数列:

[1, 2, 4, 8, 16, 32, 41, 53, 64, 82, 106, 151, 164, 212, 302, 328, 424, 604, 656, 848, 1208, 1312, 1696, 2173, 2416, 2624, 3392, 4346, 4832, 6191, 8003, 8692, 9664, 12382, 16006, 17384, 24764, 32012, 34768, 49528, 64024, 69536, 99056, 128048, 139072, 198112, 256096, 328123, 396224, 512192, 656246, 1312492, 2624984, 5249968, 10499936, 20999872]

約数ペア:

[(1, 20999872), (2, 10499936), (4, 5249968), (8, 2624984), (16, 1312492), (32, 656246), (41, 512192), (53, 396224), (64, 328123), (82, 256096), (106, 198112), (151, 139072), (164, 128048), (212, 99056), (302, 69536), (328, 64024), (424, 49528), (604, 34768), (656, 32012), (848, 24764), (1208, 17384), (1312, 16006), (1696, 12382), (2173, 9664), (2416, 8692), (2624, 8003), (3392, 6191), (4346, 4832)]