28390120

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{571}}^1$

素因数の和:706

約数の個数: 64

約数和(自身を含む): 70424640

約数和(自身を除く): 42034520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 113, 220, 226, 440, 452, 565, 571, 904, 1130, 1142, 1243, 2260, 2284, 2486, 2855, 4520, 4568, 4972, 5710, 6215, 6281, 9944, 11420, 12430, 12562, 22840, 24860, 25124, 31405, 49720, 50248, 62810, 64523, 125620, 129046, 251240, 258092, 322615, 516184, 645230, 709753, 1290460, 1419506, 2580920, 2839012, 3548765, 5678024, 7097530, 14195060, 28390120]

約数ペア:

[(1, 28390120), (2, 14195060), (4, 7097530), (5, 5678024), (8, 3548765), (10, 2839012), (11, 2580920), (20, 1419506), (22, 1290460), (40, 709753), (44, 645230), (55, 516184), (88, 322615), (110, 258092), (113, 251240), (220, 129046), (226, 125620), (440, 64523), (452, 62810), (565, 50248), (571, 49720), (904, 31405), (1130, 25124), (1142, 24860), (1243, 22840), (2260, 12562), (2284, 12430), (2486, 11420), (2855, 9944), (4520, 6281), (4568, 6215), (4972, 5710)]