21253071

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{353}}^1$

素因数の和:471

約数の個数: 32

約数和(自身を含む): 33712128

約数和(自身を除く): 12459057

約数列:

[1, 3, 7, 21, 47, 61, 141, 183, 329, 353, 427, 987, 1059, 1281, 2471, 2867, 7413, 8601, 16591, 20069, 21533, 49773, 60207, 64599, 116137, 150731, 348411, 452193, 1012051, 3036153, 7084357, 21253071]

約数ペア:

[(1, 21253071), (3, 7084357), (7, 3036153), (21, 1012051), (47, 452193), (61, 348411), (141, 150731), (183, 116137), (329, 64599), (353, 60207), (427, 49773), (987, 21533), (1059, 20069), (1281, 16591), (2471, 8601), (2867, 7413)]