19781640

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{54949}}^1$

素因数の和:54966

約数の個数: 48

約数和(自身を含む): 64291500

約数和(自身を除く): 44509860

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, 360, 54949, 109898, 164847, 219796, 274745, 329694, 439592, 494541, 549490, 659388, 824235, 989082, 1098980, 1318776, 1648470, 1978164, 2197960, 2472705, 3296940, 3956328, 4945410, 6593880, 9890820, 19781640]

約数ペア:

[(1, 19781640), (2, 9890820), (3, 6593880), (4, 4945410), (5, 3956328), (6, 3296940), (8, 2472705), (9, 2197960), (10, 1978164), (12, 1648470), (15, 1318776), (18, 1098980), (20, 989082), (24, 824235), (30, 659388), (36, 549490), (40, 494541), (45, 439592), (60, 329694), (72, 274745), (90, 219796), (120, 164847), (180, 109898), (360, 54949)]