19916480

素因数分解:

$2^6\times 5^1\times {\mathrm{109}}^1\times {\mathrm{571}}^1$

素因数の和:697

約数の個数: 56

約数和(自身を含む): 47945040

約数和(自身を除く): 28028560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 109, 160, 218, 320, 436, 545, 571, 872, 1090, 1142, 1744, 2180, 2284, 2855, 3488, 4360, 4568, 5710, 6976, 8720, 9136, 11420, 17440, 18272, 22840, 34880, 36544, 45680, 62239, 91360, 124478, 182720, 248956, 311195, 497912, 622390, 995824, 1244780, 1991648, 2489560, 3983296, 4979120, 9958240, 19916480]

約数ペア:

[(1, 19916480), (2, 9958240), (4, 4979120), (5, 3983296), (8, 2489560), (10, 1991648), (16, 1244780), (20, 995824), (32, 622390), (40, 497912), (64, 311195), (80, 248956), (109, 182720), (160, 124478), (218, 91360), (320, 62239), (436, 45680), (545, 36544), (571, 34880), (872, 22840), (1090, 18272), (1142, 17440), (1744, 11420), (2180, 9136), (2284, 8720), (2855, 6976), (3488, 5710), (4360, 4568)]