19650140

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{313}}^1$

素因数の和:438

約数の個数: 48

約数和(自身を含む): 42940128

約数和(自身を除く): 23289988

約数列:

[1, 2, 4, 5, 10, 20, 43, 73, 86, 146, 172, 215, 292, 313, 365, 430, 626, 730, 860, 1252, 1460, 1565, 3130, 3139, 6260, 6278, 12556, 13459, 15695, 22849, 26918, 31390, 45698, 53836, 62780, 67295, 91396, 114245, 134590, 228490, 269180, 456980, 982507, 1965014, 3930028, 4912535, 9825070, 19650140]

約数ペア:

[(1, 19650140), (2, 9825070), (4, 4912535), (5, 3930028), (10, 1965014), (20, 982507), (43, 456980), (73, 269180), (86, 228490), (146, 134590), (172, 114245), (215, 91396), (292, 67295), (313, 62780), (365, 53836), (430, 45698), (626, 31390), (730, 26918), (860, 22849), (1252, 15695), (1460, 13459), (1565, 12556), (3130, 6278), (3139, 6260)]