20697976

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{509}}^1$

素因数の和:568

約数の個数: 64

約数和(自身を含む): 46267200

約数和(自身を除く): 25569224

約数列:

[1, 2, 4, 8, 13, 17, 23, 26, 34, 46, 52, 68, 92, 104, 136, 184, 221, 299, 391, 442, 509, 598, 782, 884, 1018, 1196, 1564, 1768, 2036, 2392, 3128, 4072, 5083, 6617, 8653, 10166, 11707, 13234, 17306, 20332, 23414, 26468, 34612, 40664, 46828, 52936, 69224, 93656, 112489, 152191, 199019, 224978, 304382, 398038, 449956, 608764, 796076, 899912, 1217528, 1592152, 2587247, 5174494, 10348988, 20697976]

約数ペア:

[(1, 20697976), (2, 10348988), (4, 5174494), (8, 2587247), (13, 1592152), (17, 1217528), (23, 899912), (26, 796076), (34, 608764), (46, 449956), (52, 398038), (68, 304382), (92, 224978), (104, 199019), (136, 152191), (184, 112489), (221, 93656), (299, 69224), (391, 52936), (442, 46828), (509, 40664), (598, 34612), (782, 26468), (884, 23414), (1018, 20332), (1196, 17306), (1564, 13234), (1768, 11707), (2036, 10166), (2392, 8653), (3128, 6617), (4072, 5083)]