16854820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{557}}^1$

素因数の和:672

約数の個数: 48

約数和(自身を含む): 37966320

約数和(自身を除く): 21111500

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 340, 356, 445, 557, 890, 1114, 1513, 1780, 2228, 2785, 3026, 5570, 6052, 7565, 9469, 11140, 15130, 18938, 30260, 37876, 47345, 49573, 94690, 99146, 189380, 198292, 247865, 495730, 842741, 991460, 1685482, 3370964, 4213705, 8427410, 16854820]

約数ペア:

[(1, 16854820), (2, 8427410), (4, 4213705), (5, 3370964), (10, 1685482), (17, 991460), (20, 842741), (34, 495730), (68, 247865), (85, 198292), (89, 189380), (170, 99146), (178, 94690), (340, 49573), (356, 47345), (445, 37876), (557, 30260), (890, 18938), (1114, 15130), (1513, 11140), (1780, 9469), (2228, 7565), (2785, 6052), (3026, 5570)]