15987940

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1\times {\mathrm{241}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 35126784

約数和(自身を除く): 19138844

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 107, 124, 155, 214, 241, 310, 428, 482, 535, 620, 964, 1070, 1205, 2140, 2410, 3317, 4820, 6634, 7471, 13268, 14942, 16585, 25787, 29884, 33170, 37355, 51574, 66340, 74710, 103148, 128935, 149420, 257870, 515740, 799397, 1598794, 3197588, 3996985, 7993970, 15987940]

約数ペア:

[(1, 15987940), (2, 7993970), (4, 3996985), (5, 3197588), (10, 1598794), (20, 799397), (31, 515740), (62, 257870), (107, 149420), (124, 128935), (155, 103148), (214, 74710), (241, 66340), (310, 51574), (428, 37355), (482, 33170), (535, 29884), (620, 25787), (964, 16585), (1070, 14942), (1205, 13268), (2140, 7471), (2410, 6634), (3317, 4820)]