30921940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{227}}^1$

素因数の和:389

約数の個数: 72

約数和(自身を含む): 76416480

約数和(自身を除く): 45494540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 139, 140, 196, 227, 245, 278, 454, 490, 556, 695, 908, 973, 980, 1135, 1390, 1589, 1946, 2270, 2780, 3178, 3892, 4540, 4865, 6356, 6811, 7945, 9730, 11123, 13622, 15890, 19460, 22246, 27244, 31553, 31780, 34055, 44492, 55615, 63106, 68110, 111230, 126212, 136220, 157765, 220871, 222460, 315530, 441742, 631060, 883484, 1104355, 1546097, 2208710, 3092194, 4417420, 6184388, 7730485, 15460970, 30921940]

約数ペア:

[(1, 30921940), (2, 15460970), (4, 7730485), (5, 6184388), (7, 4417420), (10, 3092194), (14, 2208710), (20, 1546097), (28, 1104355), (35, 883484), (49, 631060), (70, 441742), (98, 315530), (139, 222460), (140, 220871), (196, 157765), (227, 136220), (245, 126212), (278, 111230), (454, 68110), (490, 63106), (556, 55615), (695, 44492), (908, 34055), (973, 31780), (980, 31553), (1135, 27244), (1390, 22246), (1589, 19460), (1946, 15890), (2270, 13622), (2780, 11123), (3178, 9730), (3892, 7945), (4540, 6811), (4865, 6356)]