21993980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{349}}^1$

素因数の和:518

約数の個数: 48

約数和(自身を含む): 48686400

約数和(自身を除く): 26692420

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 137, 230, 274, 349, 460, 548, 685, 698, 1370, 1396, 1745, 2740, 3151, 3490, 6302, 6980, 8027, 12604, 15755, 16054, 31510, 32108, 40135, 47813, 63020, 80270, 95626, 160540, 191252, 239065, 478130, 956260, 1099699, 2199398, 4398796, 5498495, 10996990, 21993980]

約数ペア:

[(1, 21993980), (2, 10996990), (4, 5498495), (5, 4398796), (10, 2199398), (20, 1099699), (23, 956260), (46, 478130), (92, 239065), (115, 191252), (137, 160540), (230, 95626), (274, 80270), (349, 63020), (460, 47813), (548, 40135), (685, 32108), (698, 31510), (1370, 16054), (1396, 15755), (1745, 12604), (2740, 8027), (3151, 6980), (3490, 6302)]