20817760

素因数分解:

$2^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{5657}}^1$

素因数の和:5695

約数の個数: 48

約数和(自身を含む): 51329376

約数和(自身を除く): 30511616

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 80, 92, 115, 160, 184, 230, 368, 460, 736, 920, 1840, 3680, 5657, 11314, 22628, 28285, 45256, 56570, 90512, 113140, 130111, 181024, 226280, 260222, 452560, 520444, 650555, 905120, 1040888, 1301110, 2081776, 2602220, 4163552, 5204440, 10408880, 20817760]

約数ペア:

[(1, 20817760), (2, 10408880), (4, 5204440), (5, 4163552), (8, 2602220), (10, 2081776), (16, 1301110), (20, 1040888), (23, 905120), (32, 650555), (40, 520444), (46, 452560), (80, 260222), (92, 226280), (115, 181024), (160, 130111), (184, 113140), (230, 90512), (368, 56570), (460, 45256), (736, 28285), (920, 22628), (1840, 11314), (3680, 5657)]