21928504

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:272

約数の個数: 64

約数和(自身を含む): 47779200

約数和(自身を除く): 25850696

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 52, 68, 79, 104, 136, 157, 158, 221, 314, 316, 442, 628, 632, 884, 1027, 1256, 1343, 1768, 2041, 2054, 2669, 2686, 4082, 4108, 5338, 5372, 8164, 8216, 10676, 10744, 12403, 16328, 17459, 21352, 24806, 34697, 34918, 49612, 69394, 69836, 99224, 138788, 139672, 161239, 210851, 277576, 322478, 421702, 644956, 843404, 1289912, 1686808, 2741063, 5482126, 10964252, 21928504]

約数ペア:

[(1, 21928504), (2, 10964252), (4, 5482126), (8, 2741063), (13, 1686808), (17, 1289912), (26, 843404), (34, 644956), (52, 421702), (68, 322478), (79, 277576), (104, 210851), (136, 161239), (157, 139672), (158, 138788), (221, 99224), (314, 69836), (316, 69394), (442, 49612), (628, 34918), (632, 34697), (884, 24806), (1027, 21352), (1256, 17459), (1343, 16328), (1768, 12403), (2041, 10744), (2054, 10676), (2669, 8216), (2686, 8164), (4082, 5372), (4108, 5338)]