30721460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19949}}^1$

素因数の和:19976

約数の個数: 48

約数和(自身を含む): 80438400

約数和(自身を除く): 49716940

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 19949, 39898, 79796, 99745, 139643, 199490, 219439, 279286, 398980, 438878, 558572, 698215, 877756, 1097195, 1396430, 1536073, 2194390, 2792860, 3072146, 4388780, 6144292, 7680365, 15360730, 30721460]

約数ペア:

[(1, 30721460), (2, 15360730), (4, 7680365), (5, 6144292), (7, 4388780), (10, 3072146), (11, 2792860), (14, 2194390), (20, 1536073), (22, 1396430), (28, 1097195), (35, 877756), (44, 698215), (55, 558572), (70, 438878), (77, 398980), (110, 279286), (140, 219439), (154, 199490), (220, 139643), (308, 99745), (385, 79796), (770, 39898), (1540, 19949)]