21657896

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{167}}^1$

素因数の和:258

約数の個数: 64

約数和(自身を含む): 46569600

約数和(自身を除く): 24911704

約数列:

[1, 2, 4, 8, 13, 26, 29, 43, 52, 58, 86, 104, 116, 167, 172, 232, 334, 344, 377, 559, 668, 754, 1118, 1247, 1336, 1508, 2171, 2236, 2494, 3016, 4342, 4472, 4843, 4988, 7181, 8684, 9686, 9976, 14362, 16211, 17368, 19372, 28724, 32422, 38744, 57448, 62959, 64844, 93353, 125918, 129688, 186706, 208249, 251836, 373412, 416498, 503672, 746824, 832996, 1665992, 2707237, 5414474, 10828948, 21657896]

約数ペア:

[(1, 21657896), (2, 10828948), (4, 5414474), (8, 2707237), (13, 1665992), (26, 832996), (29, 746824), (43, 503672), (52, 416498), (58, 373412), (86, 251836), (104, 208249), (116, 186706), (167, 129688), (172, 125918), (232, 93353), (334, 64844), (344, 62959), (377, 57448), (559, 38744), (668, 32422), (754, 28724), (1118, 19372), (1247, 17368), (1336, 16211), (1508, 14362), (2171, 9976), (2236, 9686), (2494, 8684), (3016, 7181), (4342, 4988), (4472, 4843)]