20401940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{599}}^1$

素因数の和:752

約数の個数: 48

約数和(自身を含む): 46569600

約数和(自身を除く): 26167660

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 131, 260, 262, 524, 599, 655, 1198, 1310, 1703, 2396, 2620, 2995, 3406, 5990, 6812, 7787, 8515, 11980, 15574, 17030, 31148, 34060, 38935, 77870, 78469, 155740, 156938, 313876, 392345, 784690, 1020097, 1569380, 2040194, 4080388, 5100485, 10200970, 20401940]

約数ペア:

[(1, 20401940), (2, 10200970), (4, 5100485), (5, 4080388), (10, 2040194), (13, 1569380), (20, 1020097), (26, 784690), (52, 392345), (65, 313876), (130, 156938), (131, 155740), (260, 78469), (262, 77870), (524, 38935), (599, 34060), (655, 31148), (1198, 17030), (1310, 15574), (1703, 11980), (2396, 8515), (2620, 7787), (2995, 6812), (3406, 5990)]