21787756

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{113}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 42134400

約数和(自身を除く): 20346644

約数列:

[1, 2, 4, 19, 38, 43, 59, 76, 86, 113, 118, 172, 226, 236, 452, 817, 1121, 1634, 2147, 2242, 2537, 3268, 4294, 4484, 4859, 5074, 6667, 8588, 9718, 10148, 13334, 19436, 26668, 48203, 92321, 96406, 126673, 184642, 192812, 253346, 286681, 369284, 506692, 573362, 1146724, 5446939, 10893878, 21787756]

約数ペア:

[(1, 21787756), (2, 10893878), (4, 5446939), (19, 1146724), (38, 573362), (43, 506692), (59, 369284), (76, 286681), (86, 253346), (113, 192812), (118, 184642), (172, 126673), (226, 96406), (236, 92321), (452, 48203), (817, 26668), (1121, 19436), (1634, 13334), (2147, 10148), (2242, 9718), (2537, 8588), (3268, 6667), (4294, 5074), (4484, 4859)]