19815520

素因数分解:

$2^5\times 5^1\times {\mathrm{271}}^1\times {\mathrm{457}}^1$

素因数の和:743

約数の個数: 48

約数和(自身を含む): 47089728

約数和(自身を除く): 27274208

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 271, 457, 542, 914, 1084, 1355, 1828, 2168, 2285, 2710, 3656, 4336, 4570, 5420, 7312, 8672, 9140, 10840, 14624, 18280, 21680, 36560, 43360, 73120, 123847, 247694, 495388, 619235, 990776, 1238470, 1981552, 2476940, 3963104, 4953880, 9907760, 19815520]

約数ペア:

[(1, 19815520), (2, 9907760), (4, 4953880), (5, 3963104), (8, 2476940), (10, 1981552), (16, 1238470), (20, 990776), (32, 619235), (40, 495388), (80, 247694), (160, 123847), (271, 73120), (457, 43360), (542, 36560), (914, 21680), (1084, 18280), (1355, 14624), (1828, 10840), (2168, 9140), (2285, 8672), (2710, 7312), (3656, 5420), (4336, 4570)]