21040490

素因数分解:

$2^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{503}}^1$

素因数の和:646

約数の個数: 32

約数和(自身を含む): 39191040

約数和(自身を除く): 18150550

約数列:

[1, 2, 5, 10, 47, 89, 94, 178, 235, 445, 470, 503, 890, 1006, 2515, 4183, 5030, 8366, 20915, 23641, 41830, 44767, 47282, 89534, 118205, 223835, 236410, 447670, 2104049, 4208098, 10520245, 21040490]

約数ペア:

[(1, 21040490), (2, 10520245), (5, 4208098), (10, 2104049), (47, 447670), (89, 236410), (94, 223835), (178, 118205), (235, 89534), (445, 47282), (470, 44767), (503, 41830), (890, 23641), (1006, 20915), (2515, 8366), (4183, 5030)]