19401788

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{641}}^1$

素因数の和:722

約数の個数: 48

約数和(自身を含む): 41416704

約数和(自身を除く): 22014916

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 47, 92, 94, 161, 188, 322, 329, 641, 644, 658, 1081, 1282, 1316, 2162, 2564, 4324, 4487, 7567, 8974, 14743, 15134, 17948, 29486, 30127, 30268, 58972, 60254, 103201, 120508, 206402, 210889, 412804, 421778, 692921, 843556, 1385842, 2771684, 4850447, 9700894, 19401788]

約数ペア:

[(1, 19401788), (2, 9700894), (4, 4850447), (7, 2771684), (14, 1385842), (23, 843556), (28, 692921), (46, 421778), (47, 412804), (92, 210889), (94, 206402), (161, 120508), (188, 103201), (322, 60254), (329, 58972), (641, 30268), (644, 30127), (658, 29486), (1081, 17948), (1282, 15134), (1316, 14743), (2162, 8974), (2564, 7567), (4324, 4487)]