20966175

素因数分解:

$3^3\times 5^2\times {\mathrm{89}}^1\times {\mathrm{349}}^1$

素因数の和:457

約数の個数: 48

約数和(自身を含む): 39060000

約数和(自身を除く): 18093825

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 89, 135, 225, 267, 349, 445, 675, 801, 1047, 1335, 1745, 2225, 2403, 3141, 4005, 5235, 6675, 8725, 9423, 12015, 15705, 20025, 26175, 31061, 47115, 60075, 78525, 93183, 155305, 235575, 279549, 465915, 776525, 838647, 1397745, 2329575, 4193235, 6988725, 20966175]

約数ペア:

[(1, 20966175), (3, 6988725), (5, 4193235), (9, 2329575), (15, 1397745), (25, 838647), (27, 776525), (45, 465915), (75, 279549), (89, 235575), (135, 155305), (225, 93183), (267, 78525), (349, 60075), (445, 47115), (675, 31061), (801, 26175), (1047, 20025), (1335, 15705), (1745, 12015), (2225, 9423), (2403, 8725), (3141, 6675), (4005, 5235)]