21139818

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{449}}^1$

素因数の和:539

約数の個数: 64

約数和(自身を含む): 51840000

約数和(自身を除く): 30700182

約数列:

[1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 59, 114, 118, 133, 177, 266, 354, 399, 413, 449, 798, 826, 898, 1121, 1239, 1347, 2242, 2478, 2694, 3143, 3363, 6286, 6726, 7847, 8531, 9429, 15694, 17062, 18858, 23541, 25593, 26491, 47082, 51186, 52982, 59717, 79473, 119434, 158946, 179151, 185437, 358302, 370874, 503329, 556311, 1006658, 1112622, 1509987, 3019974, 3523303, 7046606, 10569909, 21139818]

約数ペア:

[(1, 21139818), (2, 10569909), (3, 7046606), (6, 3523303), (7, 3019974), (14, 1509987), (19, 1112622), (21, 1006658), (38, 556311), (42, 503329), (57, 370874), (59, 358302), (114, 185437), (118, 179151), (133, 158946), (177, 119434), (266, 79473), (354, 59717), (399, 52982), (413, 51186), (449, 47082), (798, 26491), (826, 25593), (898, 23541), (1121, 18858), (1239, 17062), (1347, 15694), (2242, 9429), (2478, 8531), (2694, 7847), (3143, 6726), (3363, 6286)]