19905075

素因数分解:

$3^3\times 5^2\times {\mathrm{37}}^1\times {\mathrm{797}}^1$

素因数の和:853

約数の個数: 48

約数和(自身を含む): 37601760

約数和(自身を除く): 17696685

約数列:

[1, 3, 5, 9, 15, 25, 27, 37, 45, 75, 111, 135, 185, 225, 333, 555, 675, 797, 925, 999, 1665, 2391, 2775, 3985, 4995, 7173, 8325, 11955, 19925, 21519, 24975, 29489, 35865, 59775, 88467, 107595, 147445, 179325, 265401, 442335, 537975, 737225, 796203, 1327005, 2211675, 3981015, 6635025, 19905075]

約数ペア:

[(1, 19905075), (3, 6635025), (5, 3981015), (9, 2211675), (15, 1327005), (25, 796203), (27, 737225), (37, 537975), (45, 442335), (75, 265401), (111, 179325), (135, 147445), (185, 107595), (225, 88467), (333, 59775), (555, 35865), (675, 29489), (797, 24975), (925, 21519), (999, 19925), (1665, 11955), (2391, 8325), (2775, 7173), (3985, 4995)]