21251640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{433}}^1$

素因数の和:856

約数の個数: 64

約数和(自身を含む): 64058400

約数和(自身を除く): 42806760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 409, 433, 818, 866, 1227, 1299, 1636, 1732, 2045, 2165, 2454, 2598, 3272, 3464, 4090, 4330, 4908, 5196, 6135, 6495, 8180, 8660, 9816, 10392, 12270, 12990, 16360, 17320, 24540, 25980, 49080, 51960, 177097, 354194, 531291, 708388, 885485, 1062582, 1416776, 1770970, 2125164, 2656455, 3541940, 4250328, 5312910, 7083880, 10625820, 21251640]

約数ペア:

[(1, 21251640), (2, 10625820), (3, 7083880), (4, 5312910), (5, 4250328), (6, 3541940), (8, 2656455), (10, 2125164), (12, 1770970), (15, 1416776), (20, 1062582), (24, 885485), (30, 708388), (40, 531291), (60, 354194), (120, 177097), (409, 51960), (433, 49080), (818, 25980), (866, 24540), (1227, 17320), (1299, 16360), (1636, 12990), (1732, 12270), (2045, 10392), (2165, 9816), (2454, 8660), (2598, 8180), (3272, 6495), (3464, 6135), (4090, 5196), (4330, 4908)]