21340780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{2729}}^1$

素因数の和:2778

約数の個数: 48

約数和(自身を含む): 49533120

約数和(自身を除く): 28192340

約数列:

[1, 2, 4, 5, 10, 17, 20, 23, 34, 46, 68, 85, 92, 115, 170, 230, 340, 391, 460, 782, 1564, 1955, 2729, 3910, 5458, 7820, 10916, 13645, 27290, 46393, 54580, 62767, 92786, 125534, 185572, 231965, 251068, 313835, 463930, 627670, 927860, 1067039, 1255340, 2134078, 4268156, 5335195, 10670390, 21340780]

約数ペア:

[(1, 21340780), (2, 10670390), (4, 5335195), (5, 4268156), (10, 2134078), (17, 1255340), (20, 1067039), (23, 927860), (34, 627670), (46, 463930), (68, 313835), (85, 251068), (92, 231965), (115, 185572), (170, 125534), (230, 92786), (340, 62767), (391, 54580), (460, 46393), (782, 27290), (1564, 13645), (1955, 10916), (2729, 7820), (3910, 5458)]