21691880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{77471}}^1$

素因数の和:77489

約数の個数: 32

約数和(自身を含む): 55779840

約数和(自身を除く): 34087960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 77471, 154942, 309884, 387355, 542297, 619768, 774710, 1084594, 1549420, 2169188, 2711485, 3098840, 4338376, 5422970, 10845940, 21691880]

約数ペア:

[(1, 21691880), (2, 10845940), (4, 5422970), (5, 4338376), (7, 3098840), (8, 2711485), (10, 2169188), (14, 1549420), (20, 1084594), (28, 774710), (35, 619768), (40, 542297), (56, 387355), (70, 309884), (140, 154942), (280, 77471)]