399916

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:225

約数の個数: 24

約数和(自身を含む): 781200

約数和(自身を除く): 381284

約数列:

[1, 2, 4, 11, 22, 44, 61, 122, 149, 244, 298, 596, 671, 1342, 1639, 2684, 3278, 6556, 9089, 18178, 36356, 99979, 199958, 399916]

約数ペア:

[(1, 399916), (2, 199958), (4, 99979), (11, 36356), (22, 18178), (44, 9089), (61, 6556), (122, 3278), (149, 2684), (244, 1639), (298, 1342), (596, 671)]