21993136

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:218

約数の個数: 80

約数和(自身を含む): 49996800

約数和(自身を除く): 28003664

約数列:

[1, 2, 4, 8, 11, 16, 22, 29, 31, 44, 58, 62, 88, 116, 124, 139, 176, 232, 248, 278, 319, 341, 464, 496, 556, 638, 682, 899, 1112, 1276, 1364, 1529, 1798, 2224, 2552, 2728, 3058, 3596, 4031, 4309, 5104, 5456, 6116, 7192, 8062, 8618, 9889, 12232, 14384, 16124, 17236, 19778, 24464, 32248, 34472, 39556, 44341, 47399, 64496, 68944, 79112, 88682, 94798, 124961, 158224, 177364, 189596, 249922, 354728, 379192, 499844, 709456, 758384, 999688, 1374571, 1999376, 2749142, 5498284, 10996568, 21993136]

約数ペア:

[(1, 21993136), (2, 10996568), (4, 5498284), (8, 2749142), (11, 1999376), (16, 1374571), (22, 999688), (29, 758384), (31, 709456), (44, 499844), (58, 379192), (62, 354728), (88, 249922), (116, 189596), (124, 177364), (139, 158224), (176, 124961), (232, 94798), (248, 88682), (278, 79112), (319, 68944), (341, 64496), (464, 47399), (496, 44341), (556, 39556), (638, 34472), (682, 32248), (899, 24464), (1112, 19778), (1276, 17236), (1364, 16124), (1529, 14384), (1798, 12232), (2224, 9889), (2552, 8618), (2728, 8062), (3058, 7192), (3596, 6116), (4031, 5456), (4309, 5104)]