638830064

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{654539}}^1$

素因数の和:654608

約数の個数: 20

約数和(自身を含む): 1258025880

約数和(自身を除く): 619195816

約数列:

[1, 2, 4, 8, 16, 61, 122, 244, 488, 976, 654539, 1309078, 2618156, 5236312, 10472624, 39926879, 79853758, 159707516, 319415032, 638830064]

約数ペア:

[(1, 638830064), (2, 319415032), (4, 159707516), (8, 79853758), (16, 39926879), (61, 10472624), (122, 5236312), (244, 2618156), (488, 1309078), (976, 654539)]