21131894

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1$

素因数の和:165

約数の個数: 64

約数和(自身を含む): 40919040

約数和(自身を除く): 19787146

約数列:

[1, 2, 7, 14, 23, 29, 31, 46, 58, 62, 73, 146, 161, 203, 217, 322, 406, 434, 511, 667, 713, 899, 1022, 1334, 1426, 1679, 1798, 2117, 2263, 3358, 4234, 4526, 4669, 4991, 6293, 9338, 9982, 11753, 12586, 14819, 15841, 20677, 23506, 29638, 31682, 41354, 48691, 52049, 65627, 97382, 104098, 131254, 144739, 289478, 340837, 364343, 459389, 681674, 728686, 918778, 1509421, 3018842, 10565947, 21131894]

約数ペア:

[(1, 21131894), (2, 10565947), (7, 3018842), (14, 1509421), (23, 918778), (29, 728686), (31, 681674), (46, 459389), (58, 364343), (62, 340837), (73, 289478), (146, 144739), (161, 131254), (203, 104098), (217, 97382), (322, 65627), (406, 52049), (434, 48691), (511, 41354), (667, 31682), (713, 29638), (899, 23506), (1022, 20677), (1334, 15841), (1426, 14819), (1679, 12586), (1798, 11753), (2117, 9982), (2263, 9338), (3358, 6293), (4234, 4991), (4526, 4669)]