21457912

素因数分解:

$2^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{181}}^1$

素因数の和:296

約数の個数: 64

約数和(自身を含む): 48484800

約数和(自身を除く): 27026888

約数列:

[1, 2, 4, 7, 8, 14, 28, 29, 56, 58, 73, 116, 146, 181, 203, 232, 292, 362, 406, 511, 584, 724, 812, 1022, 1267, 1448, 1624, 2044, 2117, 2534, 4088, 4234, 5068, 5249, 8468, 10136, 10498, 13213, 14819, 16936, 20996, 26426, 29638, 36743, 41992, 52852, 59276, 73486, 92491, 105704, 118552, 146972, 184982, 293944, 369964, 383177, 739928, 766354, 1532708, 2682239, 3065416, 5364478, 10728956, 21457912]

約数ペア:

[(1, 21457912), (2, 10728956), (4, 5364478), (7, 3065416), (8, 2682239), (14, 1532708), (28, 766354), (29, 739928), (56, 383177), (58, 369964), (73, 293944), (116, 184982), (146, 146972), (181, 118552), (203, 105704), (232, 92491), (292, 73486), (362, 59276), (406, 52852), (511, 41992), (584, 36743), (724, 29638), (812, 26426), (1022, 20996), (1267, 16936), (1448, 14819), (1624, 13213), (2044, 10498), (2117, 10136), (2534, 8468), (4088, 5249), (4234, 5068)]