19929820

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{107}}^1\times {\mathrm{139}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 43182720

約数和(自身を除く): 23252900

約数列:

[1, 2, 4, 5, 10, 20, 67, 107, 134, 139, 214, 268, 278, 335, 428, 535, 556, 670, 695, 1070, 1340, 1390, 2140, 2780, 7169, 9313, 14338, 14873, 18626, 28676, 29746, 35845, 37252, 46565, 59492, 71690, 74365, 93130, 143380, 148730, 186260, 297460, 996491, 1992982, 3985964, 4982455, 9964910, 19929820]

約数ペア:

[(1, 19929820), (2, 9964910), (4, 4982455), (5, 3985964), (10, 1992982), (20, 996491), (67, 297460), (107, 186260), (134, 148730), (139, 143380), (214, 93130), (268, 74365), (278, 71690), (335, 59492), (428, 46565), (535, 37252), (556, 35845), (670, 29746), (695, 28676), (1070, 18626), (1340, 14873), (1390, 14338), (2140, 9313), (2780, 7169)]