19870938

素因数分解:

$2^1\times 3^2\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{239}}^1$

素因数の和:427

約数の個数: 48

約数和(自身を含む): 44928000

約数和(自身を除く): 25057062

約数列:

[1, 2, 3, 6, 9, 18, 31, 62, 93, 149, 186, 239, 279, 298, 447, 478, 558, 717, 894, 1341, 1434, 2151, 2682, 4302, 4619, 7409, 9238, 13857, 14818, 22227, 27714, 35611, 41571, 44454, 66681, 71222, 83142, 106833, 133362, 213666, 320499, 640998, 1103941, 2207882, 3311823, 6623646, 9935469, 19870938]

約数ペア:

[(1, 19870938), (2, 9935469), (3, 6623646), (6, 3311823), (9, 2207882), (18, 1103941), (31, 640998), (62, 320499), (93, 213666), (149, 133362), (186, 106833), (239, 83142), (279, 71222), (298, 66681), (447, 44454), (478, 41571), (558, 35611), (717, 27714), (894, 22227), (1341, 14818), (1434, 13857), (2151, 9238), (2682, 7409), (4302, 4619)]