21291470

素因数分解:

$2^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{509}}^1$

素因数の和:652

約数の個数: 32

約数和(自身を含む): 39657600

約数和(自身を除く): 18366130

約数列:

[1, 2, 5, 10, 47, 89, 94, 178, 235, 445, 470, 509, 890, 1018, 2545, 4183, 5090, 8366, 20915, 23923, 41830, 45301, 47846, 90602, 119615, 226505, 239230, 453010, 2129147, 4258294, 10645735, 21291470]

約数ペア:

[(1, 21291470), (2, 10645735), (5, 4258294), (10, 2129147), (47, 453010), (89, 239230), (94, 226505), (178, 119615), (235, 90602), (445, 47846), (470, 45301), (509, 41830), (890, 23923), (1018, 20915), (2545, 8366), (4183, 5090)]