20844440

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{163}}^1$

素因数の和:336

約数の個数: 64

約数和(自身を含む): 49593600

約数和(自身を除く): 28749160

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 139, 163, 184, 230, 278, 326, 460, 556, 652, 695, 815, 920, 1112, 1304, 1390, 1630, 2780, 3197, 3260, 3749, 5560, 6394, 6520, 7498, 12788, 14996, 15985, 18745, 22657, 25576, 29992, 31970, 37490, 45314, 63940, 74980, 90628, 113285, 127880, 149960, 181256, 226570, 453140, 521111, 906280, 1042222, 2084444, 2605555, 4168888, 5211110, 10422220, 20844440]

約数ペア:

[(1, 20844440), (2, 10422220), (4, 5211110), (5, 4168888), (8, 2605555), (10, 2084444), (20, 1042222), (23, 906280), (40, 521111), (46, 453140), (92, 226570), (115, 181256), (139, 149960), (163, 127880), (184, 113285), (230, 90628), (278, 74980), (326, 63940), (460, 45314), (556, 37490), (652, 31970), (695, 29992), (815, 25576), (920, 22657), (1112, 18745), (1304, 15985), (1390, 14996), (1630, 12788), (2780, 7498), (3197, 6520), (3260, 6394), (3749, 5560)]