21203812

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1\times {\mathrm{211}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 44211328

約数和(自身を除く): 23007516

約数列:

[1, 2, 4, 7, 14, 28, 37, 74, 97, 148, 194, 211, 259, 388, 422, 518, 679, 844, 1036, 1358, 1477, 2716, 2954, 3589, 5908, 7178, 7807, 14356, 15614, 20467, 25123, 31228, 40934, 50246, 54649, 81868, 100492, 109298, 143269, 218596, 286538, 573076, 757279, 1514558, 3029116, 5300953, 10601906, 21203812]

約数ペア:

[(1, 21203812), (2, 10601906), (4, 5300953), (7, 3029116), (14, 1514558), (28, 757279), (37, 573076), (74, 286538), (97, 218596), (148, 143269), (194, 109298), (211, 100492), (259, 81868), (388, 54649), (422, 50246), (518, 40934), (679, 31228), (844, 25123), (1036, 20467), (1358, 15614), (1477, 14356), (2716, 7807), (2954, 7178), (3589, 5908)]