18839728

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{97}}^1\times {\mathrm{199}}^1$

素因数の和:365

約数の個数: 40

約数和(自身を含む): 37671200

約数和(自身を除く): 18831472

約数列:

[1, 2, 4, 8, 16, 61, 97, 122, 194, 199, 244, 388, 398, 488, 776, 796, 976, 1552, 1592, 3184, 5917, 11834, 12139, 19303, 23668, 24278, 38606, 47336, 48556, 77212, 94672, 97112, 154424, 194224, 308848, 1177483, 2354966, 4709932, 9419864, 18839728]

約数ペア:

[(1, 18839728), (2, 9419864), (4, 4709932), (8, 2354966), (16, 1177483), (61, 308848), (97, 194224), (122, 154424), (194, 97112), (199, 94672), (244, 77212), (388, 48556), (398, 47336), (488, 38606), (776, 24278), (796, 23668), (976, 19303), (1552, 12139), (1592, 11834), (3184, 5917)]