18245840

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{2887}}^1$

素因数の和:2979

約数の個数: 40

約数和(自身を含む): 42973440

約数和(自身を除く): 24727600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 2887, 3160, 5774, 6320, 11548, 14435, 23096, 28870, 46192, 57740, 115480, 228073, 230960, 456146, 912292, 1140365, 1824584, 2280730, 3649168, 4561460, 9122920, 18245840]

約数ペア:

[(1, 18245840), (2, 9122920), (4, 4561460), (5, 3649168), (8, 2280730), (10, 1824584), (16, 1140365), (20, 912292), (40, 456146), (79, 230960), (80, 228073), (158, 115480), (316, 57740), (395, 46192), (632, 28870), (790, 23096), (1264, 14435), (1580, 11548), (2887, 6320), (3160, 5774)]