21455140

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21893}}^1$

素因数の和:21916

約数の個数: 36

約数和(自身を含む): 52414236

約数和(自身を除く): 30959096

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21893, 43786, 87572, 109465, 153251, 218930, 306502, 437860, 613004, 766255, 1072757, 1532510, 2145514, 3065020, 4291028, 5363785, 10727570, 21455140]

約数ペア:

[(1, 21455140), (2, 10727570), (4, 5363785), (5, 4291028), (7, 3065020), (10, 2145514), (14, 1532510), (20, 1072757), (28, 766255), (35, 613004), (49, 437860), (70, 306502), (98, 218930), (140, 153251), (196, 109465), (245, 87572), (490, 43786), (980, 21893)]