18997940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{821}}^1$

素因数の和:932

約数の個数: 48

約数和(自身を含む): 43500240

約数和(自身を除く): 24502300

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 89, 130, 178, 260, 356, 445, 821, 890, 1157, 1642, 1780, 2314, 3284, 4105, 4628, 5785, 8210, 10673, 11570, 16420, 21346, 23140, 42692, 53365, 73069, 106730, 146138, 213460, 292276, 365345, 730690, 949897, 1461380, 1899794, 3799588, 4749485, 9498970, 18997940]

約数ペア:

[(1, 18997940), (2, 9498970), (4, 4749485), (5, 3799588), (10, 1899794), (13, 1461380), (20, 949897), (26, 730690), (52, 365345), (65, 292276), (89, 213460), (130, 146138), (178, 106730), (260, 73069), (356, 53365), (445, 42692), (821, 23140), (890, 21346), (1157, 16420), (1642, 11570), (1780, 10673), (2314, 8210), (3284, 5785), (4105, 4628)]