30891980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{263}}^1\times {\mathrm{839}}^1$

素因数の和:1118

約数の個数: 48

約数和(自身を含む): 74511360

約数和(自身を除く): 43619380

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 263, 526, 839, 1052, 1315, 1678, 1841, 2630, 3356, 3682, 4195, 5260, 5873, 7364, 8390, 9205, 11746, 16780, 18410, 23492, 29365, 36820, 58730, 117460, 220657, 441314, 882628, 1103285, 1544599, 2206570, 3089198, 4413140, 6178396, 7722995, 15445990, 30891980]

約数ペア:

[(1, 30891980), (2, 15445990), (4, 7722995), (5, 6178396), (7, 4413140), (10, 3089198), (14, 2206570), (20, 1544599), (28, 1103285), (35, 882628), (70, 441314), (140, 220657), (263, 117460), (526, 58730), (839, 36820), (1052, 29365), (1315, 23492), (1678, 18410), (1841, 16780), (2630, 11746), (3356, 9205), (3682, 8390), (4195, 7364), (5260, 5873)]