21171738

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{617}}^1$

素因数の和:691

約数の個数: 64

約数和(自身を含む): 52208640

約数和(自身を除く): 31036902

約数列:

[1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 43, 57, 86, 114, 129, 133, 258, 266, 301, 399, 602, 617, 798, 817, 903, 1234, 1634, 1806, 1851, 2451, 3702, 4319, 4902, 5719, 8638, 11438, 11723, 12957, 17157, 23446, 25914, 26531, 34314, 35169, 53062, 70338, 79593, 82061, 159186, 164122, 185717, 246183, 371434, 492366, 504089, 557151, 1008178, 1114302, 1512267, 3024534, 3528623, 7057246, 10585869, 21171738]

約数ペア:

[(1, 21171738), (2, 10585869), (3, 7057246), (6, 3528623), (7, 3024534), (14, 1512267), (19, 1114302), (21, 1008178), (38, 557151), (42, 504089), (43, 492366), (57, 371434), (86, 246183), (114, 185717), (129, 164122), (133, 159186), (258, 82061), (266, 79593), (301, 70338), (399, 53062), (602, 35169), (617, 34314), (798, 26531), (817, 25914), (903, 23446), (1234, 17157), (1634, 12957), (1806, 11723), (1851, 11438), (2451, 8638), (3702, 5719), (4319, 4902)]